LIBRARY 

OF  THE 

UNIVERSITY  OF  CALIFORNIA. 


Class 


GENERAL  INDEX 


TO    THE    FOUR 
VOLUMES    OF 


Ore  Dressing 


BY 

ROBERT   H.  RICHARDS,  S.B.,  LL.D. 

i  \ 

Professor  of  Mining  Engineering  and  Metallurgy  at  the  Massachusetts  Institute  of 
Technology,  Boston,  Mass.,  U.  S.  A. 


1909 

McGRAW-HILL   BOOK  COMPANY 

NEW   YORK 


INDEX. 


A  GENERAL  GUIDE  TO  ALL  FOUR  VOLUMES. 


Pages  1-643,  Vol.  I:  644-1197,  Vol.  II;  1199-1610,  Vol.  Ill;  1611-2052,  Vol.  IV. 


Aachen,  wash  trommel  at  331 

Aaron,  C.  H.,  gold  amalgamation 788 

gravity  stamps 226 

leaching  gold  and  silver xix 

losses  in  gold  milling   .. 1180 

on  amalgamated  plates    752 

leaching 1167 

testing  gold  ores  by  chlorination 1173 

Abadie,  E.  R.,  gravity  stamps 224 

North  Star  gold  stamp    mill  at  Grass  Valley, 

California 1175 

on  mortars 165 

plates  at  the  North  Star  mill    787 

A  Bartlett  mill xxvii 

Abbe  Engineering  Company.    Abbe  spiral  feed  ....  1323 

tube  mill 1280,  1298 

at  Guanajuato,  capacity  of 1291 

sizing  test  of  feed  and  discharge  1290 

mills 1291,  1626,  1677 

Abbott,  J.  W.,  running  a  stamp  mill 229 

Absorption  of  amalgam  by  plates    765 

mercury  by  amalgamating  plates     1514 

Accelerated  jig 507,  510,  515,  519,   610 

details  of  stroke    638 

mechanism,  air  pressure  and  gravity    537 

cam  and  gravity  in  Stutz  coal  jig    537 

cam  and  spring  537 

disc  motion    536 

for  jigs    533 

hammer  and  spring  on  Collom  jigs     536 

motion  Harz  jigs  at  Mill  125    1701,  1702,  1703 

on  Wilfley  table    673 

Accessory  apparatus    842,  1570 

Accounting,  mine    1923 

Accounts  and  reports  1 122 

bibliography  for    1173 

Accuracy  of  machine  sampling    1575 

Acids,  action  of  on  mercury  730 

for  cleaning  mercury    786 

Acids  used  in  settling  tests   1147 

on  amalgamated  plates    751 

Acid  water,  cause  of  base  bullion   783 

effect  of    906 

in  amalgamation     751 

on  amalgamated  plates 750 

jig  tanks 523 

plates    749 

screens    173 

neutralized  173 

Acme  concentrator.     L.  H.  L.  Huddart    2023 

E.  Walker    2023 

guide  for  gravity  stamps     154,  155 

ore  feeders  at  Mill  100    1624 

table    1506 

Across  the  San  Juan  Mountains.     T.  A.  Rickard    . .  1923 

Action  of  air  jig    822 

belt  tables    698 

breakers  compared  55 

buddies     704 

bumping  belt  tables   669 

tables    682 

centrifugal  force    827 

classifiers    387 

crushing  machines    300 

Gates  breaker   39 

gravity  stamps    144 

jaw  breakers    36 


Action  of  jaw  and  spindle  breakers  52 

Rittinger  table    668 

rolls 62 

steam  stamps     113 

trommels    373 

vanners 644,  646,  656 

Actions  in  crushing 8 

Adair-Usher  cyanide  process  on  the  Rand    1644 

Adalbert  Works,  hand  picking  at    492 

Adams,  J.  M.,  amalgamating  pans     290,  291 

amalgam  at  the  Owyhee  silver  mill    787 

dimension  of  Black  Hill  traps    773 

end  and  side-shake  vanners   655,  656 

form  of  riffles  in  mercury  traps   772 

gravity  stamps     223,  226,  230 

impurities  in  amalgam     251 

life  of  retorts 783 

pointed  boxes    477 

slope  of  plates  746 

splash  plates    736 

Adams,  W.  J.,  amalgamated  plates   739,  746 

amalgamation   787,  1173 

amalgamation  and  gold  mills      xix 

mercury  traps    772 

vanners  655,  656,  727 

Adelaide  mil]  1794 

Adhesion    839 

in  dry  concentration     826 

of  minerals,  effect  of    4 

separation  by     831 

Adjustment  of  Blake  breakers    16,  22,  23 

Card  concentrator 1483 

classifier   430 

Comet  breaker    43 

Frue  vanner  for  testing   1 153 

Gates  breaker 39 

gravity  stamps     219 

gyratory  breakers   1218 

Hooper  air  jig     822,  823 

jigs      552,   598 

machines    1115 

Mechernich  magnetic  separators  at  Mill  135  ...   1736 

throw  on  jigs     531,  594,  595 

travel,  slope,  and  water  on  vanners    660 

spindle  breakers 47 

vanners    653,  663,  658,  659 

Wilfley  table  head  motion    1466 

Advantages  and  disadvantages  of  various  crushing 

machines    313 

accelerated  mechanism  on  jigs 535 

accounts  H23 

action  of  jaw  breaker    55 

action  of  spindle  breaker    55 

air  versus  water  concentration 825 

arrastra     238 

Collom  jig    514 

concentration  over  smelting    1 

electric  power    1091 

Elmore  oil  process    832 

filter-pressing     plants    as    against     decantation 

plants     1646,  1647 

flat  mill  site  1086 

gravity  stamps     222 

hand  breaking     12 

hand  jigs    892 

hand  picking 480,  487 

hehcoid  conveyor  over  older  types 1582 

high-speed  rolls     88 

large  breakers    49 


194228 


Pages  1-643,  Vol.  I. 


ORE   DRESSING. 


Pages  644-1197,  Vol.  II. 


Advantages  of  1-arge  motors    1092 

machine  feeding 1115 

magnetic  concentration    1053 

mercury  wells    771 

Muntz  metal  plates    750 

Parsons  &  Fisher  jig     518 

picking  in  the  mine 481 

pipe  and  plug  jig  spigot    527 

removing  dust  before  washing  coal     817 

riffle  tables     679 

rock  breaker  at  mine     1109 

rolls  of  large  diameter  83 

sectional  mills     1108 

separate  treatment  of  mine  fines      1111 

side  hill  site  for  mills     1085 

silver  combination  mills    1040 

silver-plated  amalgamated  plates     748 

skimming  jigs    577 

sliding  block  mechanism 535 

A-frames  for  gravity  stamps     157,  158 

Africa,    milling    at    the    Simmer    &    Jack,    G.    O. 

Swart 2035 

stamp  mill  practice  in,  F.  C.  Roberts    2044 

Agassiz,  A. viii 

Aggregation  affecting  separation    889 

of  minerals,  effect  of    3 

Agitation       . . 892,  1611 

after  sizing  or  sorting    891 

in  kieves     726 

ratio  on  vanners     665 

use  made  of,  in  mills     890 

Agitator  for  bottle  tests  ^ 1157 

Agitators  for  amalgamation 780 

lor  clay  1076 

Ahun  Colliery,  Carr  disintegrator  at     284 

Aikinite,  specific  gravity  of     1188 

Air  blast,  continuous    816 

dry  blanket      825 

panning    825 

for  emery     1079 

graphite    1075 

Hochstedt  apparatus      816 

on  horizontal  belt  818 

bubbles  affecting  separation   890 

effect  of    4 

on  free  settling    464 

classifier  at  Engis 817 

concentration,  bibliography  for  837 

by    815 

concentrators,  classification  of    816 

using  centrifugal  force 818 

continuous  blast    816 

gaps,  ampere  turns  required  for    795 

hoists,  Pilling 1608 

jigs      640,  816,   820 

Hooper-Paddock 820 

Krom    824 

pressure  and  gravity  jig  mechanism 537 

separator,  Clarkson-Stanfield      820,   828 

Mumford  &  Moodie     818 

Pape-Henneberg    818,  828 

settling,  use  made  of,  in  mills      889 

suction  used  in  asbestos  dressing    817 

versus  water  for  concentration     825 

Aitken,  R.  M.,  stamp  mill  construction   2048 

Akens  &  Evans  slimer,  the    1500,  2022 

Akins  Si  Evans  concentrator   2023 

Akron  Chili  mill     1307 

table  of  sizes,  capacities,  speeds,  weights,  etc.  . .  1308 

Aktien  Company,  new  mill  of    1924 

Alabama  graphite  mills     1075 

hematite,  cost  of  concentrating    1135 

ores  roasted  for  magnetism     814 

iron  ore  concentration   1176 

magnetic  concentration  of 833,  835,  836 

washing  in 1 180 

Alaska,  cost  of  producing  gold  in 1975,  1976,  1977 

dredging  in    1009 

stamp  mill  practice  at  Douglas  Island   2039 

Treadwell  Gold  Mining  Co 1181 

amalgam  squeezer  used  by  781 

mill 1127,    1133,   2037,  2042 

costs  and  output  at  the   2048 

descriptions  of,  R.  A.  Kinzie  . .; 2033 

heavy  stamps     '. 220 

H.  Watson  2043 

mortar  blocks    148 

Albany  compound  for  greasing  guides    156 

grease   1098 


Albertite,  specific  gravity  of    1188 

Albite,  specific  gravity  of  1188 

Alburtis,  Pennsylvania,  mill  at    1055 

Alden  breaker     59,  61 

Alexandria  Coal  Co.,  washing  plant 1178 

Alice  mill 1134 

Alignment  of  rolls 71 

Alkali  to  prevent  sickening  of  mercury     751 

Allard  coal  washing  methods       2018 

Alleghany  Iron  Co 809 

Allegheny  Ore  and  Iron  Company,  McLanahan  and 

Stone  single-roll  crusher  at  1241 

Allen,  Robert,  West  Australia  metallurgical    practice  1323 

Allevard,  calcining  for  friability    9 

hand  picking  at      492 

magnetic  separation  at      834 

mill  at    1178 

picking  at     487 

roasting  for  friability  at     58 

magnetism  at     814 

sizes  of  ore  hand  picked  at 487 

Allis,  E.  P.,  Co.,  amalgamating  pan    . .  243,  244,  245,  246, 

247,  249 

clean-up  pan   251 

edge  runner  mill     270 

mechanical  batea    683 

on  design  of  cams 197 

stamp  tappets    189 

patent  cams 194 

stamp  mortar    228 

Allis,  E.  P.,  on  shoe  shanks ' 181 

stamp  bosses    187 

stems    187 

rolls 76,  111 

at  Mill  136     .  . .  1737,  1738 


Allis-Chalmers  Company,  an  improved  trommel 
annular  picking  table     .... 
Ayton  thick-pulp  extractor 
ball  mills,  regards  work,  cost,  etc. 

Challenge  feeder  

clean-up  pans  at  Mill  100 

corrugated  rolls     

costs  of  breaking  ore 


1360 
1435 
1408 
2016 
1577 
1625 
1242 
1222 

Frue  vanners  at  Mill  127    1711,  1712 

Mill  170 1868 

Gates  ore  breakers  1222 

rock  and  ore  breakers    1222 

tube  and  ball  mills     .    1323 

mill    1296 

Hancock  jig     1440,   1459 

improved  Wolf -Tongue  classifier 1387 

Lamb  automatic  tailings  sampler     1574,  1809 

Richards'  shallow-pocket  hindered-settling  clas- 
sifier        1384 

rolls    1137,  1244 

at  mills 1707,  1724,  1750,  1751,   1752,   1854, 

1866,    1867,    1877,    1878,    1885,    1898,    1913 

simple  steam  stamp  at  Mill  182    1909 

single-cylinder  steam  stamp    1256 

stamps  at  Mill  100     1624 

steam  stamp    201 1 

suspended  frame  vanner   1503 

testing  screens   1 138 

toothed  rolls     .    1242 

vanners  at  Mill  136   1739 

Allis  Corliss  engine    994,  997,  1000 

pump     994,  997,  1000,  1003 

reliance  rolls    82 

steam  stamp     114,  116,  118,  119,  120,  121, 

122,   123,  124,  125,   126,   127,   128  131,  133,  142 

valve  motion    124 

Allison  Rand  mine     2044 

Allouez  Copper  mine,  hand  picking  at     492 

mill      1089,    1107,    1109,    1174 

cost  of  stamping   142 

steam  stamps 120 

Alma  Emmons  sludge  mill       xxv,  902 

Alpha  DeLaval  separator     827 

'  Alsing  Company,  the  J.  R.  driers 1597,  1609 

tube  mills     1323 

cylinder      234,    266 

bibliography  of   294 

tube  mill     1280,  1294 

table  of  sizes,  power,  etc 1296 

Altenberg  classifier      416,  475,  478 

mine,  wash  trommel  at    331 

Saxony,  calcining  ore  for  friability  at 9 

mill  at 1086,  1173 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Alternate  polarity  in  magnetic  separation    798 

Alternating  current  in  magnetic  separation     835 

Althans,  E.,  Ball  stamp    143 

Blake,  Marsden  and  Alden  breakers    61 

buddies,  slime,  and  percussion  tables    729 

Dingey  mill    293 

German  and  California  stamps      230 

Krom  jig    839 

Krom's  rolls  and  coal  rolls     112 

on  breakers    61 

ore  dressing  1 186 

Phoenix  and  Sholl  pneumatic  stamps      143 

Aluminum  amalgam     730 

atomic  weight  of     1188 

bronze  cloth  screen    174 

plate  screens    174 

specific  gravity  of     1188 

Alum  used  in  settling  kaolin   1149 

tests 1147 

Amador  City,  California,  mill  at    1032,  1037 

County,  California,  mills  in    1180 

cost  of  milling     1134 

mill,  screens     174 

mills,  plates  in    788 

stamp  mills 226 

mill,  stamps  in    228 

Amalgam  absorbed  by  plates 765 

amount  gf  bullion  in     761 

bullion  contents  of 783 

cleaning  of    250,  780 

distribution  of,  from  plates 764 

fineness  of    764 

general  discussion  of,  Leon  de  Mortillet 2025 

gold  731 

and  silver  in  hard    762 

in     767 

kettle     758 

nature  of    208,  1512 

plain  copper  plates  coated  with     747 

presses     1517,   1518,  1519 

produced  by  fine  gold,  hard,  A.  L.  Collins   ....  2024 

proportions  of  gold  and  silver  in     762 

recovered  by  sweating  plates    759 

remedy  for  hard.     E.  Woakes   2024 

removal  of  impurities     251 

retorting  781 

right  consistency  on  plates    756 

scoop    758 

silver     731 

sodium    730 

specific  gravity  of   1 188 

squeezer  at  the  Alaska-Treadwell,  hydraulic    . .  2024 

power 1519 

squeezing  of 781,  1517 

strainer  781 

treatment  and  retorting  of    2024 

used  on  copper  plates    747 

Amalgams    730 

Amalgamated  copper  surface  on  Gilpin  County  tables  681 

Amalgamated  plates      731    1014,  1512 

See  also  Plates. 

absorption  of  mercury  by   1514 

amount  of  drop     743 

at  Mill  98 622 

at  Mill  96,  details  of    1618 

clean  up  203 

details  of  in  the  mills     737 

distributors  and  collectors  used  on    743 

dressing  of.    W.  H.  Kritzer  2024 

for  testing    1 156 

heavily  silver  plated.     F.  W.  Cindel     2024 

inside 178 

material  for    1514 

Muntz  metal  for   1512 

on  Wilfley  table 1656 

quality  of  copper  for    747 

silver  plated    1512 

slope  of    744 

speed  of  waves  and  thickness  of  films    746 

suggestion  is  made  that  pulp  flow  across.     J. 

R.  Sears   2024 

Amalgamating  device,  a  laboratory.    H.  S.  Guess    . .  2024 

mills,  bibliography  for    1173 

for  silver  ores    1039 

pan    232,  239,  777 

bibliography  for 290 

Boss  type    242,  244,  245,  246,  247 

circulation  of  pulp    241 

cost  of     .  250 


Amalgamating  pan  dies   ...........                           .  245 

E.  P.  Allis  Co  ...........  244,  245,  246,  247,  249 

for  testing    .........................    ....  1  157 

pan,  frame,  bottom,  and  central  cone  .......  241 

Fraser  &  Chalmers     ......  244,  245,  246,  247,  249 

in  Lyon  mill   ..................  241,  243,  244,  246 

loss  of  mercury  in    .......................  250 

method  of  working     ......................  248 

power,  wear,  losses  of  iron  and  mercury    ....  249 

Risdon  Iron  Works     ......  244,  245,  246,  247,  249 

shafts  and  gears    .........................  248 

sides,  flanges,  ring,  lining,  covers    ..........  244 

size  of  stuff  treated  by     ...................  248 

spider,    driver,   cap,   lubrication,    and   grind- 

ing ....................................  247 

steam  pipe  and^steam  jacket    ..............  244 

tank  and  Boss  systems    ...................  248 

temperature  of    ...................  248 

Union  Iron  Works    ____  243,  244,  245,  246,  247,  249 

weight  of  spider  and  driving  cone  in    .......  247 

wings,  muller,  shoes,  and  pulp  current     .....  245 

tables,  back  deflectors  for  ...................  1514 

Krupp    .................................  788 

shaking    ................................  1513 

Amalgamation     ........................  730,  892,  1512 

agitators  for     ..............................  780 

an  improved  process  for.     A.  C.  Beatty    ......  2024 

apparatus  for     .............................  731 

at  mills      ........................  1516,  1638,  1663 

bibliography  for    ...........................  787 

bottle  amalgamation  for  testing     .............  1996 

combination  process  of     ....................  248 

description  of  a  new  machine  for   .............  2025 

effect  of  arsenic  on     .....................  ...  1654 

solutions  of  salts    ......................  '.  .  .  767 

temperature  on   .......................  766,  1516 

J.  J.  MacDowell     ..........  ..2024 

C.  W.  Merrill    .........................  1520 

followed  by  agitation   .......................  89  1 

concentration    .......................  1616,  1652 

and  lixiviation  of  concentrates     ......  1616,  1620 

and  tailings     ....  1616,  1617 

of  tailings    ......................  1616,  1623 

lixiviation    ..........................  1616,  1634 

and  concentration    .................  1616,  1631 

in  New  Zealand.     J.  Park     .................  2024 

the  Southern  Urals.     C.  T.  Nissen     ........  2024 

inside  of  batteries  at  Mill  112    ...............  1658 

the  mortar.    C.  DeKalb  ...................  2024 

loss  of  gold  in   .............................  786 

of  auriferous  pyrites     .......................  2024 

gold  ores.     T.  T.  Read    ..................  1520 

new  plates    ..............................  752 

pan  amalgamation    .........................  1517 

plates,  an  article  on.     N.  S.  Keith   ...........  2024 

of  Muntz  metal     .........................  2024 

preparation  of  pulp  for   .....................  1514 

principle  of    ..............................  4,  2024 

Reese  River  process  of    .....................  248 

settlers  for    ................................  777 

side  shake    ................................  2025 

sizing  before    ..............................  1514 

temperature  at  Mill  106    ....................  1640 

tests    .................................  1156,  1167 

J.  R.  Cooper     ...........................  2024 

use  made  of,  in  mills   .......................  890 

of  copper  plates  for.     E.  Halse   ............  2024 

versus  concentration  in  Gilpin  County   ........  1047 

Washoe  process  of    .........................  248 

Amalgamator,  Bazin's     .........................  787 

Eureka  rubber    ............................  776 

Gowan's  ..................................  789 

Hewitt's    ..................................  788 

King  gold    ................................  777 

Lagarrigue  Sutil    ...........................  2024 

Lancaster  gold.     J.  H.  Lancaster     ...........  1530 

new  type  of     ..............................  2024 

Pierce     ...............................  1520.  1517 

Amalgamators    .............................  775,  1517 

amalgamating  pans     ........................  777 

American  ball  pulverizer  ........................  234 

bibliography  for  ............  -.-•••.  .........  ^95 

Blower  Company  fans  for  furnishing  air  to  pneu- 

matic tables  at  Mill  151     ..................  1804 

Concentrator  Company,  Knowles  New  Century 

magnetic  separator    ................  1541,  1568 

g  mechanism     ..........................  537 

ew  Century  Blake  breaker  ...............  1222 

jigs   ..............................  1459 


jig 

Ne 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II 


American  Developing  and  Mining  Company  mill  xxvii,  1028 

filter  press  at  Mill  102    1630 

gauge    1194 

gold  stamp  mills    1178 

improvements  in  ore  dressing 1 175 

Process  Company  driers   1597,  1609 

rock  breaker     59 

screen  gauge    172 

Smelters  Securities  Company,  Tecolotes  mill    . .  1748 

steam  stamp    201 1 

Steel  Mfrs.  Association  on  screen  gauges 173 

wire  gauges    227 

Zinc  Extraction  Co.,  international  separators  at .  .  1535 
Lead   &  Smelting  Co.,  Huff   electrostatic  sepa- 
rator      1552 

Americus  Zinc  and  Lead  Mining  Company,  separa- 
tion of  zinc  blende  and  barytes 1565 

Amicus  mill,  milling  cost  at 1640 

Ammeberg,  heating  ore  for  friability    9 

Heberli  mills  at     259 

jig  at 641 

bed  at 574 

mill  at 911,  1086,  1121,  1176 

picking  at    492 

removal  of  slimes  by  classifier   373 

screening  at  :    373 

separation  of  pyrite  and  blende  at  829 

sieve  scale  at  367 

Utsch  jig  at   520 

Ammonia  used  on  amalgamated  plates    753 

Amortization  of  capital    1128 

Amount  and  temperature  of  water  for  gravity  stamps  221 

of  mercury  fed  to  stamps    208 

throw  of  jigs    594 

Amperes.    See  also  Power. 

Ampere  turns  for  magnets 794 

Amphibole,  specific  gravity  of    1188 

A.  M.  W.  mill,  Leadville,  milling  at  the.    A.     W. 

Warwick     2043 

Amygdaloid  ore,  mills  for  990 

Anaconda  classifier     395,  396,  476 

coal  washer    2018 

concentration  at.     M.  Schwerin    2037 

concentrator.     D.  E.  Woodbridge     2040 

Copper  Mining  Co 1836 

Huntington  mill  screens  at .  1317 

in  1905.     L.  S.  Austin    1922 

mill    xxvi,  984,  1181,  1182 

plant  of    ..  2037 

H.  O.  Hofman    1922 

rolls  at  mills    1822,  1824,  1828,  1829 

Analcite,  specific  gravity  of    1188 

Analyses  of  Cammett  table  products    678 

of  canvas  table  products     701,  702 

crude  ore  and  concentrates  at  Mill  167. .  1858,  1859 

Luhrig  table  products    670 

mill  products.     See  individual  mills  in  Chap- 
ter XX 

products  at  Mill  162    1847 

of  Anchor  mill  ore   815 

Ball-Norton  magnet  798 

Golden  gate  table     682 

Hallett  table    676 

magnetic  separation .  802,  803,  804,  809,  810,  813 

Parsons  table     669 

pneumatic  belt  concentrator     818 

Richards  annular  classifier    406 

roasting  for  magnetism    815 

slime  table 1172 

roasted  products   814 

vanner  products    650,  664 

Wilfley  table  products    674 

Analysis  by  specific  gravity  tests   1159 

for  minerals   1 162 

of  Butte  ore  135 

Morison's  curves  of  velocity  of  stamps 215 

products  of  disintegration  and  screening    ....  830 

of  dry  separation     820" 

Krom  air  jig    824 

magnetic  separation   802 

oil  process    832 

Paddock  air  jig 823 

separated  by  decrepitation    829 

See  Assaying. 

Anchor  mill,  roasting  and  magnetic  tests  on  ore    ...  814 

speed  of  jigs  at 593 

Andalusite,  specific  gravity  of    1188 

Anderson's  concentrating  mill    1184 

Andesine,  specific  gravity  of     1188 

Andesite,  weight  of    1190 


1177 
869 

228 


490 

1435 

1437 

406 

755 

1188 

834 


Andree,  Th.     Dressing  of  graphite  in  Austria  and  Ba- 
varia  

Andrews  dredging  pump     , 

Angels,  California  stamps  at    

Camp,  California,  arrastra  at 1039 

mills  at  1024,  1033,  1034,  1038 

shoes  and  dies  at    183 

stamps  at 224 

Angle  irons  in  launders     872 

of  friction     1244 

in  trommels   374 

of  nip,  formula   93 

gyratory  breakers     1218 

how  affected    94 

of  rolls  89,  109,  110,  1226 

affected  by  speed    94 

slide  of  ore    337 

Anglesite,  specific  gravity  of     1 188 

Angleur,  double  discharge  on  jigs  at    584 

Anhydrite,  specific  gravity  of    1188 

Animal  oils    1098 

Ankerite,  specific  gravity  of    1188 

Anna  mill     1177 

wire  rope  in 1096 

stamp  mill,  spitzlutten  at    423 

Works,  hand  picking  at    492 

Annealing  copper  plate   747 

graphite  crucibles    784 

iron  for  permeability    792 

Annular  picking  table    

Allis-Chalmers  type 

Krupp  type    

vortex  classifier   

Anodes  used  in  electroplating  copper  plates    

Anorthite,  specific  gravity  of    

Anthony,  W.  A.     Edison,  Buchanan,  and  Wetherill 

separators     

Anthracite,  angle  of  nip  required  to  crush 94 

hindered  settling  test  on 617,  622 

settling  velocity  of     466,  469 

specific  gravity  of   1188 

Antidote  for  mercury     730 

Antimony  amalgam    730 

atomic  weight  of     1188 

hindered  settling  test  on 614,  617 

ore  concentrated  by  Hooper  air  jig     823 

separated  by  oil    831 

settling  velocity  of     466,  469 

specific  gravity  of  1188 

Antioquia,  Colombia,  amalgamated  plates  at    . 

Anvil  blocks  for  Nordberg  steam  stamp    

Anzin  Company,  air  blast  for  coal  dust     

using  air  blast     

Apatite,  mill  for    

specific  gravity  of   1 188 

used  in  making  phosphate    815 

Apophyllite,  specific  gravity  of    1188 

Apparatus,  accessory    842 

used  for  amalgamation    731 

Appendix 1187,  1999 

bibliography  for    1173 

Appleby,  C.  J 229 

Appliances  for  elevating  ore  and  water    859 

Application  of  magnets   7     790 

riffles     723 

Apron  distributors    857 

for  feeding  slime  tables   689 

jigs    549 

plates    ...^ ; 740 

Aragonite,  specific  gravity  of 1 188 

Arcadian  mill    131 

Archer  breaker    57,  58,  60 

Archimedean  screw  for  jig  tailings 588 

Archimedes  screw  dredge    1009 

Arc  lamp  at  Mill  152 1931 

lights    1100 

Area  of  amalgamated  plates     744 

discharge  for  stamps    209 

steam  stamps     129 

sorting  column    403 

Argall,  Philip.     Capacity  for  rolls     1226 

cylindrical  driers     1599 

driers     880,  1600 

and  drying  of  ore   1609 

dry  crushing    2010 

economic  range  of  gravity  stamps     1276 

feeding  tube  mills    " 1288,  1323 

four-tube  drier  at  Bessie  mill     1600 

Metallic  plant    1600 

grinding  pans  versus  tube  mills   1282 


749 
1247 


.817 
1059 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Argall,  Philip,  ideas  on  a  modern  fine  crushing  plant . .  2018 

jig 639 

journal  pressure  in  rolls    97 

limit  of  economical  sizing 1366 

modern  crushing  and  grinding  machinery   1278 

multi-tubular  drier  at  Mill  143    1770 

on  Gilpin  County  mills     1047 

rules  for  sampling 848 


screens . oso 

ore  dressing  in  British  Columbia   2042 

question  of  hole  vs.  mesh    1366 

rolls     1230 

for  dry  crushing    ' 1224 

sampling  and  dry  crushing  in  Colorado     1244 

of  orel     . 1609 

screens,  kind,  speeds,  and  cost  of  screening    . . .   1365 

settlement  of  slimes    1417 

settling  of  roasted  slimes     1419 

speed  for  rolls  and  speed  curves     1224 

standardization  of  screens  2020 

use  of  Vezin  sampler  1572 

Argentite,  specific  gravity  of    1188 

Argon,  atomic  weight  of    1188 

Arithmetical  ratio  for  sieve  scale     367 

Arizona  and  Sonora.     D.  E.  Woodbridge   1923 

concentration  at  Humboldt.    A.  H.  Hamilton   .   2038 

in.     F.  H.  Probert     2037 

of  copper  in.    F.  H.  Probert    2033,  2041 

concentrators  in.     A.  Morison   „ 2042 

Copper  Company.     D.  E.  Woodbridge    1923 

Limited 1868 

mill  of.     A.  Morison    2041 

use  of  lime  for  slime  settling    1416 

districts.     Cost  of  producing  copper  in 1953,  1954, 

1955 

gasoline  engines  in   1184 

milling  at  Mowry   2042 

milling  practice  in.    D.  E.  Woodbridge    2038 

mills  in    1005,  2043 

slime  treatment  in    1411 

stamp  mill    1175 

type  of  settling  tanks  at  Morenci    1413 

Arminius  Chemical  Company    1913 

mill    1913 

Armitage,  H.  E.,  adjustments  of  jigs    640 

double-cone  classifier   426 

on  making  bed  material  for  jigs     574 

spilzlutte.     Hopper -shaped  unwaterer     476 

Arrangement  of  holes  in  screens    168 

trommels    384 

machinery  in  a  modern  mill.    A.  Harvey 2048 

machines    891 

mills    1086,  1107 

plates     737,  742 

screen  holes   369 

trommels 364 

Arrastra 232,  237 

bibliography  of    289 

description  of  the.     A.  Lakes    2013 

discussion  of  construction.     E.  L.  Ballou  2016 

mill    1039 

value  of  the.    M.  F.  Leech    2014 

Arrastras,  number  used     231 

Arsenic  amalgam    730 

atomic  weight  of     1188 

in  amalgam      767 

specific  gravity  of    1188 

Arsenolite,  specific  gravity  of   1 188 

Arsenopyrite,  hindered  settling  test  on    616,  617 

roasted  for  porosity    829 

settling  velocity  of     466,  469 

specific  gravity  of     1 188 

Artesian  well  for  water    1105 

Asbestos  board  used  in  retorting     781 

covering  for  steam  pipes     1091 

dressing     817,  838,  1079,  1178,  1182 

in  Quebec    1916 

R.  Stokes     2046 

methods  of  treating.     E.  B.  Wilson     2041 

milling  of.     F.  Cirkel    1568 

E.  S.  Regelman    2036 

in  Canada.     F.  Cirkel     2034 

Ascending-current  cones  or  cylinders 1402 

Ashes  used  in  preparing  amalgamated  plates      756 

retorts     781 

Ashio  mill,  Japan 2047 

Aspen,  Colorado,  electric  power  at     1091 

hammers  used  10 

mill  at    933,  1004 


Aspen,  Colorado,  rock  house  at 485 

Asphalt  floors  in  mills     1088 

Asphaltum,  specific  gravity  of    1188 

Asphalt  varnish  used  in  electroplating     754 

Assaying  tests    1163 

Assay  office    1160 

for  mill     1088 

of  tailings  at  Mill  48 13Q 

Assays  and  sizing  test  of  feed  and  products  of  Hunt- 

ington  mills    1317 

of  jig  tailings   607 

mill  products  Mill  142 1767 

minerals  1162 

products  at  Mill  129    1718 

of  Paddock  air  jig   823 

stamp  pulp 211 

tailings    213 

zinc  mill  products     1169 

See  also  Analyses. 

Atacama,  Chili,  mill  at    1182 

mill,  Taltal,  Chili.     S.  H.  Loram    2033 

Atacamite  separated  by  screening     830 

specific  gravity  of     1188 

Athabasca  mine,  British  Columbia,  milling'  at  the. 

E.  N.  Fell      2034 

Atkinson,  A.  S.    Lake  Superior  milling  practice    . . .    1419 

Atlantic  mill     1175,  1180,  1183 

cost  of  breaking  at     51 

crushing  at     57 

mining  and  milling     1131 

steam  stamping     142 

details  of  cylinders  of  steam  stamps 126 

Evans  classifier  in 395 

launders  at     873 

screen  for  stamp 121 

slime  tables  at     : 697 

steam  stamps    120,  135 

Mining  Co 1181 

Atlas  engine     902 

Atlin  district,  B.  C.,  dredging  in  the 2037 

Atmosphere,  weight  of     . . . 1188 

Atmospheric  discharge  for  jigs     583 

stamp    140 

Atomic  weights,  table  of     1188 

Attaching  jig  screens      539 

Attachment  of  jig  plunger  to  connecting  rods     529 

screens  in  trommels    355 

Attendance  required  by  American  Process  Company 

driers    1599 

Blake  breaker  at  Mill  186    1917 

Gates  breaker  at  Mill  159    1828 

Pierce  amalgamator  at  Mill  114    1663 

rotary  drier  at  Mill  186     1917 

steam  stamps  at  Mill  182     1912 

Wetherill  magnetic  separators    1525 

Wilfley  roasting  furnace    1548 

Attraction  of  various  substances  by  magnets 796 

Attrition  causing  slimes     1121 

Atwood  amalgamator     775 

Atwpod,  M.     Microscopic  examination  of  pulp 228 

Augite,  strength  of     301 

Aultman  balanced  shaking  screen     2018 

jaw  breaker     2009 

Auriferous  antimony  ore,  concentration  of  an     2030 

Aurora  mill,  jigs  at    641 

pointed  boxes  at     477 

Austin  gyratory  breaker    1210,  2009 

Austin,  L.  S.,  Anaconda  Copper  Company  in  1905      1922 

Deister  concentrator  at  the  Baltic  mill     2023 

Washoe  Plant  of  the  Anaconda  Copper  Com- 
pany    2033,  2043 

Austin  Manufacturing  Company.    Cost  of  breaking 

ore     1222 

Austin  gyratory  breakers     1222 

Austin,  W.  L.  amalgamating  pan,  Boss  system 291 

at  the   Harshaw  mill 290 

Boss  tubular  classifier  at  Harshaw  mill 478 

gravity  stamps 224 

grizzlies  in  the  Harshaw  mill     385 

milling  at  Harshaw  and  Charleston  mills,  Ari- 
zona       1174 

on  impurities  in  amalgam     251 

settlers  and  retorts  at  the  Harshaw  mill    787 

wear  of  amalgamating  pans 249 

Austinville,  Virginia,  mill  at     1065 

New  Century  jig  at 1446 

zinc  ore  from   809 

Australasian  practice    1713 

Australia,  amalgamated  plates  in     737,  742,  745 

concentration  in    2033 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Australia,  details  of  stamps 226 

dredging  in 1009 

dry  concentration  in 837,  838 

panning  in  825 

Hancock  jig  in    504 

mercury  wells  and  riflles  in     769,  770 

metallurgical  practice  in  West.     R.  Allen    1323 

mill  practice  in.     W.  T.  Saunders     2039 

Western.     R.  Stokes    2046 

plates  in 788 

stamp  mills  in     1 180 

stamps  in 226,  227,  229 

treatment  of  lead  zinc  ores  in.     V.  F.  S.  Low  . .  2034 

low-grade  copper  ore  in.     J.  J.  Muir     2039 

ore  at   the   Lucknow   gold    field.      A.    R. 

Canning 2040 

water  used  in  stamp  mills     222 

Australian  gold  mills 1110,  1119 

Metal  Company's  mill,  Ullrich  magnetic  separ- 
ators at 1535 

practice,  grinding  pans  in     1283 

Austria,  chromite  mill  in     1073 

graphite  dressing  in    1177 

mills  in     1075 

Austrian  graphite  mill,  kieves  in 727 

Author's  tests  on  jigging  mixed  sizes    630 

suction    627 

Automatic  discharges  on  jigs    553,  576,  577,  583,  584 

stay  box  for     584 

feeders     853,  854,  855,  856 

ore  feeders     1578 

samplers  Vezin-type  at  Mill  167   1857,  1858 

at  Mill  172    1873,  1874 

tripper  at  Mill  174     1883 

A  very  automatic  scales  at  Mill  105     1635 

Avpirdupoi?  weights,  equivalents  of    1 187 

Axinite,  specific  gravity  of    '. 1189 

Ayton  intermittent  pulp  thickener     2020 

thick  pulp  extractor     1419 

at  El  Bote  mill     1408 

Azurite,  specific  gravity  of    1 189 

B 

Babbitting  rolls     73 

Babbitt  metal  for  bearings 1098 

effect  on  mercury   751 

Babcock  &  Wilcox  boiler     910,  1090 

Back  plates,  disadvantages  of    178 

Bacon,  Earl  C viii 

rolls  at  Mill  152   1807 

Bad-Ems,  Prussia,  mill  at    1177 

Badoureau,  A.     Free  settling  in  water     477 

Baffle  board  in  mercury  wells    768 

settling  tank    459 

plates  in  distributors    857 

driers    882 

to  settle  dust     1099 

Bag  room  for  dust     883 

Bailey,  G.  E.    Gold  stamp  mills     1183 

Baize  for  tables     703 

tables  on  dredges    1012 

Baker,  G.  W.     Blake  breaker     58 

on  breakers    58 

Krom  jig   838,  839 

Krom's  improvements  on  Cornish  rolls    110 

Balanced  rolls,  Sturtevant     1232 

Balancing  of  shaking  screens     342 

Balch  magnetic  separator     834 

Baliol  mill    1184 

Ballarat,  amalgamated  plates  at    745 

plates  at     788 

single  discharge  at    209 

stamps  at     226 

Victoria,  mills  at     1180 

Ball,  C.  M.     Ball-Norton  separator 833,  1175 

Cummings  mill     292 

equations  for  concentration    1176 

on  power  used  for  crushing    309 

Ball  mills    233,  260,  1285 

Allis-Chalmers    1323 

amalgamation    1 156 

an  article  on  the     2014 

as  re-grinding  machines 1332,  1333 

at  mills     1828,  1829,   1830,  1914 

best  size  of  feed  for.    H.  J.  Brooke  1323 

bibliography  for 293 

continuous,  dry,  sieveless 2017 

discussion  of    2015 

Ferraris      1280,   1299,  1323 


Ball  mills,  Ferraris,  capacities  of 1300 

table  of  sizes,  power,  weights,  etc 1300 

fine  grinding    2015 

for  clays     2013 

Gates    1280,  1300 

table    of    sizes,    capacities,    power,    weights, 

etc 1300 

general  notes  on    1301 

Humboldt  Engineering  Works  Company     1315 

in  Australia,  capacity,  speed  of    2028 

Krupp     1231 

number  used     340 

operation  of.     H.  Fischer     1302 

sizing  test  of  ball  mill  pulp      1315 

on    2017 

using  rollers.     E.  Poetgens     1830 

versus  rolls  at  Mill  159 1916 

stamps  as  slime  makers  at  Mill  185 1303 

wear  of  steel  balls  in    2017 

wet    2016 

with  dust  separator 2017 

a  fines  separator 2028 

Ball-Norton  magnetic  separators  . . .  .797,  1527,  1568,  1527 

at  Mill  158    1826 

belt-type  at  Mill  158    ....  1822,  1824,  1825,  1822 

drum-type  at  Mill  158    1821,  2028 

results  at  Port  Henry  on  a      2028 

type  'M'  at  Mill  158  ....  1822,  1823,  1825,  1826 
Ballou,   E.   L.      Stamping    and    concentration    on 

sulphide  gold  ore    1 184 

Ball's  revolving  knife  buddle     328,  334 

Ball  steam  stamps 114,  118,  119,  120,  121,  122, 

123,  124,  126,  127,  128,  130,  131,  132,  133,  134,  142, 

valve  motion    123 

Bally  balanced  cam   226 

cam     228 

Baltic  mill,  Redridge,  Michigan.     E.  D.  McDermott  2040 

W.  McDermott 2041 

Baltic  mill,  Redridge,  Michigan      , 2044 

Mining  Company     1895 

copper  hand  book     1925 

Banking  in  stamp  mortar     215 

prevention    218 

Banks  on  vanners     652,  656,  662 

Bank,  thickness  of,  in  trommels 378,  380 

Banner  mine,  concrete  mortar  block     148 

Barber,  G.  M.     Griison  ball  mill  at  Atacama,  Chili  .    1182 

Barbour,  T.  J.     Dredging  in  California    1182 

Bardwell,  E.  S.     Free-settling  velocities    1421 

sorting  tube  for  testing    1988 

Barge  with  log  washers     326 

Barite,  angle  of  nip  to  crush    94 

decrepitation  of 829 

dressing  at  Long  Island.     E.  K.  Judd     2027 

methods  used  in  dressing.    E.  Higgins,  Jr.    ...   2026 

specific  gravity  of 1 189 

washing    1173 

in  Tennessee.     E.  K.  Judd 2027 

Barium,  atomic  weight  of 1188 

Barlor,  J,  C.     Sampling  of  concentrating  tables    .  .  .    2032 

Barnaby,  G.  A.     Free-settling  velocities    1421 

Barnhardtite,  specific  gravity  of 1 189 

Barnhart,  G.  A.,  on  Griffin  mill    284 

Barrel  for  clean-up    234,  264 

Barrels  for  shipping  concentrates 1112,  1113 

Barren  Springs,  Virginia,  iron  ore  from     809 

Bar  riffles    721,  724 

screens    336 

Barry  tube  mill  lining    2014 

Bars  for  supporting  jig  sieves    539 

Barth,  C.     Krom's  rolls  vs.  stamps 1 12 

stamps  and  rolls   229 

Barth,  K.     Ball,  Leavitt,  and  Allis  stamps 142 

Blake  and  Krom  breakers    60 

on  breakers    60 

Bartle  pulverizer     233 

bibliography  for 294 

Bartlett 1004,  1119 

and  Snow  Company,  driers    1609 

the  C.  O.,  drag   or  disc  conveyors     1583 

friction  clutches     1067 

Grill  four-compartment  driers 1597 

fine  crushing  mill   1004,  1005 

Bartlett,  F.  L.     Concentrating  blende     1183 

jerking  table    492 

milling    1181 

Bartlett,  J.  C.     Pneumatic  concentration    837 

picking  table     489 

Simplex  concentrator 1487 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Bartlet,  J.  C,  table 678,  680,  1153,  2022 

in  Germany     2023 

used  as  jigs  at  Mill  142    1767 

Bartola  pan     1036 

Bartsch  breaker 61 

bumping  circular  table    691 

rotary  percussion  tables  at  Mill  150 1800 

rotary  percussion  table,  the 1497 

round  table    2022 

Barus,  C.     Settling  in  liquids    1186 

settling  of  very  fine  particles  in  liquids 477,  479 

tests  on  clay  particles     474 

Barytes  and  zinc  blende,  separation  of  by  decrepita- 
tion  1565 

Basalt,  strength  of    301 

Base  metals,  effect  on  mercury    751 

in  bullion     785 

Basin  Reduction  Company 1848 

washers  for  clay   333,  335,  1076 

Batea    1152 

belt  for  vanners     657 

mechanical     683 

Bath  for  silver  plating     755 

Batopilas,  amalgamating  pans  at     291 

Mexico,  Silver  Mill  at     1174 

Battens  for  mills     1088 

Battery,  Boss  standard    1267 

cloth,  brass  and  iron    171 

construction     2012 

frame,  cantilever.     I.  C.  Boss 1278 

M.  P.  Boss    2012 

description  of  a     2012 

screens  at  Mill  96     1618 

Foote  screen    1270 

gun-metal  at  Mill  185   1915 

standard  ten-stamp    1267 

water,  the  temperature  of  the     2012 

Baugh's  mill  of  cone  type     292 

Baum  jig     519,  643 

coal  jig     523 

advantages  of    519 

air  pressure  and  gravity    537 

disadvantages    '. . .  519 

discharge    581 

mechanism     537 

washing- plant.     Barnsley,  Eng 2051 

Herne  coal  washing  jig    2021 

Bauschinger,  J.     Strength  of  stone 316 

Bauxite,  specific  gravity  of     1189 

Bavaria,  graphite  dressing  in     1 177 

Baxter  breaker    56,  58,  60,  61 

Bayliss,  R.  T.     Amalgam  on  plates     787 

on  Blanton  cams    194 

Bay  State  Mining  Company  mill     xxvii,  1023 

Bazin's  amalgamator     787 

Beach  Glen  iron  ore  concentrated  by  magnets  ....  802,  803 

Beakers  for  settling  tests     1146 

Bearings  for  cam  shaft    190,  191 

rolls     72 

Beason,  L.  H.     Boston  Con.  Mg.  Co.  mill,  Garfield, 

Utah 2038 

the  mill  of  the  Utah  Copper  Co.,  Garfield,  Utah . .  2045 

Beatty,  A.  C.     An  improved  amalgamation  process  2024 

Beaumont,  W.,  on  breakers 59 

Cole's  stone  breaker    59 

Becker  Foundry  &  Machine  Co 30 

Becker,  G.  F.  and  S.  F.  Emmons.    Amalgamating 

pans    291 

amalgamation      789 

arrastra     290 

edge  runners    295 

Becket  Foundry  &  Machine  Co.,  rolls    76 

Beckett  and  McDowell  geared  rolls  at  Mill  183 1913 

Bedding  for  jigs      1458 

Harz  jigs  at  Mill  183    1913 

Bed  of  hand  jig 894 

of  jigs 495,  552 

effect  of 1463 

material  for     573 

size  of  grains  for     575 

tests  on     630 

on  concentrators,  depth  of    1510 

on  vanners,  thickness  of 


proper  condition  of,  on  jigs    

thickness  of,  on  fine  concentrators 
Beguelin  mine,  Blake  breaker  at  .... 
Belgium,  jigs  in  

mills  in    

phosphate  dressing  in  

Bell  discharge  for  jigs  


595 

644 

1621 

641 

1176,  1185 


582 


Bellom,  M 1135 

breakers    57,  60,  61 

capacity  and  water  for  classifier    432 

drum  separator  at  Friedrichssegen    833 

finest  size  jigged 606 

hand  and  machine  breaking.     Schranz  breaker.  57 

Jigs    641 

on  number  of  sieves  for  jigs     590 

ore  dressing  in  Saxony,  The  Harz,  and  Rhenish 

Prussia      H76 

pneumatic  machine  at  Himmelfurst  mine    837 

pointed    boxes    at     Friedrichssegen.     Meinecke 

hydraulic  classifier,  Meinecke  spitzlutte     ....  477 

Schranz  breaker    60 

Schranz  mill    .  . 290 

Stein  belt  table  and  Linkenbach  slime  table  ...  728 

trommels.     Schmidt  spiral  sieve    385 

value  of  hand  picking    492 

Bellevue  coal  washer,  Scranton,  Penn.     G.  W.  Harris  2051 

Bell,  R.     Concentration  in  British  Columbia      2034 

dredging  on  the  Snake  River,  Idaho    2036 

Grasshopper  Creek    2041 

Bell,  Robert  N.     Note  on  Triplex  rolls 1244 

Belpair  boilers     992 

Belt  and  pulley  for  trommels     .  356 

batea 657 

Blasdel     647 

canvas  used  in  Mill  41 650 

concentrator,  air     818 

conveyors    859   861 

at  mills    1631,  1670,  1690,  1691,  1706,  1708, 

1709,   1710,  1735,  1750,  1759,  1760,  1762,  1763, 

1764,   1768,  1769,  1771,  1772,   1828,  1851,  185~3, 

1868,  1869,  1876,  1913 

for  dredges     1012 

picking  on      ' 489 

rubber     859 

driven  pumps    871 

elevators     862 

film  tables    697 

Brunton  table 698 

Castelnau  table 698 

Ferraris  table    698 

Uren  table 698 

for  vanners      647,  655,  657 

Loring    647 

percussion  table    1496 

rope  and  plate  conveyors  for  hand  picking     . . .  489 

screens    1357 

Callow  screen    1358 

Dunlap  perfect  clay  screen     1357 

tables    ..... 669 

bibliography  for    728 

travel  on  vanners     658,  660 

Woodbury    ,  197 

Belted  rolls    75- 

Belting  used  on  amalgamated  plates     760 

Belts    1176- 

and  pulleys    197 

conveying     1585 

proper  speed  for  belts  in  Wetherill  magnetic 

separator    1523 

corrugated      647 

corrugated  -versus  plain   6501 

cost  of  for  vanners      663 

"crack-proof"  vanner  belt    1503 

for  gravity  stamps    197 

for  hand  picking,  speed  and  capacity  of    143& 

for  mills  . .                                                1093 

link     860 

magnetic  separators  with    804 

of  vanners,  details  of     648 

or  tables  for  hand  picking    1435 

picking  and  sorting  belts  at  Mill  137     1438 

Robins  conveying  and  picking  1438,  2021 

sizes  of,  for  rolls     97 

Spadone  concentrator  belt     1503 

take-off,  in  Wetherill  magnetic  separator,  width 

thickness,  and  proper  speed  for     1524 

Bendigo,  amalgamated  plates  at   745,  762 

Australia,  mills  at     1180 

milling  practice  at.     H.  C.  Boydell    2044 

gold  milling  practice  in.     H.  C.  Boydell    2034 

iron  stamp  frames  in     160 

plates  in     788 

shoes  and  dies  at    183 

stamps  at     226 

Benedict,  W.  de  L.     Log  washer  in  South  Carolina  1180 

washing  plant      335 

on  wash  trommels    333-. 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Benson  mines,  magnetic  separation  at  

Berdan's  amalgamating  pan  

Berenger  and  Stingls  slime  tank  

Berlin,  tests  on  strength  of  stone  at  

Berrigan  centrifugal  separator  

Bertha  Zinc  Co.,  mill  

Works  

Berthelet  inclined  screen  

Berthierite,  specific  gravity  of  

Bertrand  mill,  rolls  at  

Beryl,  specific  gravity  of 

Bessemer  steel  for  shoes  and  dies  

Bessie  mill,  Argall  4-tube  drier  at  

Bethune  Mining  Co.,  France,  surface  equipment  for 

coal  washing  at  the  

Bettel,  W.  Definition  of  slimes  

Beuthen,  mill  at  1177, 

Upper  Silesia,  mill  at  

Bevel  gears  

Bibliography  for  adhesion  

amalgamation    

appendix    

breakers  and  hammers 

centrifugal  separation     

classifiers  and  laws  of  classifying     

decrepitation    

disintegrating  and  screening     

dust  chambers  and  bag  houses    

elevators  and  conveyors     

feeders  and  distributors     

gravity  stamps     

hand  picking 

jigs  and  laws  of  jigging     , 

kieves 

launders    ." 

laws  of  classifying  by  free  settling  in  water  . 

crushing  

jigging  

magnetic  concentration  and  roasting  for  mag- 
netism   

mills  and  general  milling    

pneumatic  concentration     

preliminary  crushing  

washers  

pulverizers     

pumps     

riffles     

roasting  for  friability      

roasting  for  porosity     

rolls     

sampling      

screening    

steam,  pneumatic,  and  spring  stamps     

vanners,  tables,  riffles,  and  kieves    

weathering  

Bigelow  patent  breaker  

Bilharz  cobbing  magnet  

at  Mill  126 

O.  and  E.  W.  Neubert.  Dressing  at  Freiberg, 

Saxony  

Bilharz,  O 

Altenberg  classifier  and  Rittinger  spitzlutte  .... 

Ball  stamps  

Bilharz  belt-table  

hydraulic  classifier,  siphon  separator,  Altenberg 
classifier,  Bilharz  spitzlutte  

Jig    •-:••:••••„• 

movable  sieve  jigs    

table,  Frue  vanner,  slime  table,  and  buddle .... 

•versus  Rittinger  spitzlutte  

Blake,  Kley,  Gates,  and  McCully  breakers  .... 

Carnal!  and  Crickboom  wash  trommels  

Carr  disintegrator  

Dingey  mill  

edge  runners 

general  milling  


gravity  stamps     

Griffin  roller  mill    

grizzlies,  riddles,  and  trommels     

Griison  ball  mill    

Heberli  mill     

Heberwasche,  Harz  jig,  Bilharz  jig     

Himmelfahrt  mill  at  Freiberg,  Saxony   .  . 

Huntingdon  mill    

milling  in  Missouri     

Pape-Henneberg  separator  and  Krom  jig 

dry  concentration      

picking  houses     

Rittinger's  principles    

Schwarzmann's  rolls    


. 1182, 


798       Bilharz  ,  O.  spitzlutte 423 

291  test  of  jaw  and  Blake  breakers    54 

1407                wash  trommels    332 

301  Wenstrom,  Lovett-Finney,  Chase  separators     . .  832 

2023        Bilharz  circular  jig 518 

1180                    sieve  power  jig    504 

1105               classifier   475 

2018               improved  Rittinger  spitzlutte    478 

1189               oblong  movable  sieve  power  jig     503 

110               spitzlutte     477 

1189               table    669 

185                   capacity  of     504 

1600                   at  mills     1659,  1789,  1790,  1791 

Billek,  J.     Concentration  on  galena-blende-pyrite  at 

2051                   Maiern     1185 

1397                picking  in  mine  and  mill  at  Maiern,  Austria 493 

1186  separation  plant  at  Maiern;  Siemens  and  Halske 

1087                   separators     836 

1096        Bin  and  feed  chute  for  steam  stamps   129 

839        Bingham,  Utah,  mill  at     913 

787                milling  the  ores  of.     W.  R.  Ingalls     2039 

1173        Binkley,  George  E.     Settling  system    1409 

57  Bins    . .                                                       ...  842,  1027,  1570 

839  at  mills  ....1742,  1743,  1760,  1761,  1762,  1763,  1857 

475  concentrate  drying    1570 

839                discharge  chute  in    843 

839               drier,  at  Mill  100     1625 

885               filter    1570 

884               for  concentrates    1112 

884  of  the  Wolverine  mine,  drawings  of  the  ore    . . .  2032 
223  sizes   and   capacities.      See   individual  mills  in 

492  Chapter  XX. 

639               stamp     128 

727  with  steam  pipe  for  drying  products  at  Mill  125  . .  1705 

885  Biotite,  separation  from  molybdenite  by  magnet    . . .  1568 

475                   specific  gravity  of   1189 

315  Birkinbine,  J.,  and  T.  A.  Edison.     Blake  system    .  .  57 

639  Buchanan,  Wenstrom,  Conkling,  Monarch  and 

Edison  separators  833 

832               breakers 57 

1 173  concentrating  iron    1175 

837                Conkling  separator     833 

55               cost  of  breaking  at  Atlantic  mill 51 

334               crushing  at  Atlantic  mill     57 

289               magnetic  concentration    1175 

885               milling  at  Atlantic  mill,  Lake  Superior    1175 

727                   Lake  Superior     1175 

839        Birmingham  gauge     1194 

839               Iron  foundry     76 

109               screen  gauge    172 

884        Bismuth  amalgam    730 

384               atomic  weight  of     1188 

142        Bjsmuthinite,  specific  gravity  of    1189 

727        Bismuth  removed  from  mercury    786 

839               specific  gravity  of 1189 

2009        Bituminous  coal,  specific  gravity  of    1189 

1532        Blackhawk  breaker  of  Dodge  type     31 

1532               Colorado,  mill  at    ". 1035,  1048 

Black  Hills,  breakers  at    57 

1174  cost  of  g9ld  milling  in     1132 

xix  crushing  in  cyanide  solution  in  the.    C.  H.  Fulton  2033 

478  district,  South  Dakota,  cost  of  producing  gold  in 

142  1977,  1978 

729               grizzlies  in     385 

mercury  trap     773 

475  mills  in     1175,  1176,  1181,  1182 

641               plates  in     787 

643  stamps  in    224,227 

727               steam  stamps  in    135 

476  wet  crushing  cyanide  mill  in  the.     E.  B.  Sawyer.  2044 
55        Black  Pine,  Montana,  mill  at 1175 

334        Black  sands 1008,  1013,  1017 

298               by  U.  S.  G.  S.,  investigation  of  2042 

293                Caribou  riffle  for  treating   1509 

295  concentration  by  the  U.  S.  G.  S.     K.  Thomas  .  2046 
1173                   of     2038 

223                       D.  T.  Day,  R.  H.  Richards   2047 

297               device  for  saving.     W.  Brazenall    2038 

384               Leighton  separator  for    1528 

293                method  of  recovering  gold  from     1654 

292  problem  of  the.     F.Powell     1511 

639                tests  on  at  Dawson     2034 

1185               treatment  of 2028 

296  J.  A.  Edman    2025 

2034                                California      2027 

837        Blacksmith  shop  for  mill    1087 

837        Blades  in  centrifugal  pumps     869 

492        Blaisdell  aerators  at  Mill  109 1650 

1 175  centrifugal  sand  distributor    ; 1602 

109  Company.     Blaisdell  mechanical  ore  machinery  1609 

10 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Blaisdell  distributor    1600 

excavator  1600 

at  mills  1670,  1868 

mechanical  mixer      1603 

sand  distributor    1670 

slime  agitator     1602 

system  of  mechanical  ore  handling    1600 

Blake  breakers    13,  55-61,  1223 

at  mills  ....  1617,  1618,  1621,  1624,  1724,  1737,  1742, 

1749,  1769,  1792,  1802,  1821,  1823,  1824,  1837,  1842, 

1853,   1882,  1883,   1917 

author's  tests  on  samples  crushed  in 311 

Carterville  Foundry  &  Machine  Works     1201 

Case  laboratory  breaker  of  the  Denver  Fire  Clay 

Company 1204 

comparative  wear  of  metals  in  jaws 48 

compared  with  Dodge     

Gates    52 

Denver  Engineering  Works  Company    1203 

design  of 1201 

details  of  from  the  mills   23 

sizes     16 

Eli  Whitney     13 

Farrel   Foundry  and  Machine  Company 34 

for  testing    1137 

Gates  Iron  Works    34 

horse-power  required     17 

Humboldt  Engineering  Company      1205 

information  on    18,  1223 

Krupprock     ; 1202 

lead  ore  crushed  in 274 

lever  type     21 

life  of  wearing  parts  of  at  Mill  139     1221 

National  Drill  and  Manufacturing  Company's   .    1203 

New  Century  Blake 1203 

operation  of     16 

Sturtevant  roll-jaw     1205 

toggles  used  for  pounding  blocks    489 

Von  Reytt's  tests 305 

wear  of 25,  48 

Blake  challenge  breaker 20,  59 

Blake-Denison  continuous  weighers    1603 

Weigher  Company.     Blake-Denison  Weighing 

machine      1609 

at  mills    1832,  1860 

Blake  double  jaw  breaker  at  Mill  158    1824 

Blake,  L.  I.     Blake-Morscher  separators 2027 

electrostatic  separation    1550 

magnetic  separator     833 

Blake-Marsden  fine  breaker     56,  58 

breaker  at  Mill  185   1915 

Blake-Morscher  electrostatic  separator.   A.H.Plomb    2026 

ore  separator     1550,  1611 

at  Montana  Zinc  Company's  mill      1551 

separator,  description  of  the.   L.  I.  Blake    .   2027 

separator.     W.  McA.  Johnson     2026 

at  Mill  140 1551 

treatment  of  milling  at  Mill  131 1551 

Blake  multiple  jaw  breaker 28 

pump    1008 

T.  A.,  and  S.  R.  Krom.  Improvements  by  Krom        59 

Blake  breaker      57 

of  Chateaugay  Ore  and  Iron  Co 59 

multiple  jaw  breaker     57 

svstem     60 

breakers 57,  59,  60 

edge  runners 295 

edge  stone  mills    269 

Haile  Gold  mine,  North  Carolina,  and  Chateau- 
gay  Ore  and  Iron  Company,  N.  Y 1175 

rock  breaker    20 

wearing  parts  for  breakers     48 

W.  P.     Amalgamation    789 

Blake  magnetic  separator 833 

breakers 57 

Rowland's  stamp  battery  stamp  mills  in  Cali- 
fornia, Australia,  and  Brazil.  German  over- 
flow battery,  Rittinger  stay  battery  229 

Huet  &  Geyler's  settling  cylinder,  Hundt's  sett- 
ling tub  and  Rittinger 's  setzrad 478 

jigs    640 

pivoting  of  jaw   57 

reverberatory  furnace  designed  by    829 

separating  blende  and  pyrite    829 

separating  pyrite 833 

separation  processes     839 

silver  milling  at  Butte,  Montana 1175 

two-stamp  steam  battery     143 

Wimmer's,  Rittinger's,  Harz,  and  Huet  and 
Geyler's  jigs  643 


Blanding,  L.     Amalgamation    789 

Blandy,  J.  F.     Ball  stamp     142 

pneumatic  stamp    143 

Blanket  concentrating  tables  at  Mill  118 1677 

for  mortar  blocks      148 

tables     703,  749,  1464,  1507 

tables  on  dredges      1012 

under  amalgamated  plates    735 

used  dry  for  concentrating    825 

in  sweating  plates     759 

Blanks  for  accounts   1124 

Blanton  cams 193,  225,  228,  229 

Blasdel  vanner  belt    647 

Blasting  in  the  mine      : 9 

Bleaching  powder     1167 

Bleiberg,  Rittinger  tables  at     668 

Bleichert  aerial  tramway  at  mills    1719,  1769 

wire  tramway  937,  1016 

Bleischarley  mill,  Silesia,  dry  concentration  at  the  . .  2039 

mine,  mill  at      1186 

Blende  and  pyrite  separated  by  disintegration 830 

roasting  and  magnetism    814 

separation     839,  900 

siderite  separated  by  roasting  and  magnets  . .  799 

crushed  by  rolls    62 

jigs  in  Missouri,  capacity  of     602 

mill  for     902,  907,  908 

ore,  roasting  of     57 

test  on    1168 

weight  of      1190 

separated  by  decrepitation 829 

from  pyrite    829 

»  quartz     720 

separation  at  Ammeberg 9 

weight  of 1190 

Bleyberg,  double  discharge  on  jigs  at 584 

sieve  scale  at     367 

Blinding  of  screens    175,  373 

Blisters  on  amalgamated  plates     760 

Block  corundum     1078 

system  of  selecting  ore     481 

Block  10  mine     1713 

Blomeke,  C.     Advantages  of  the  Wetherill  separator  2030 

apparatus  in  German  mills     1177 

ball  mills    293 

Bartsch,     Schranz,     Luhrig,    and    Linkenbach 

tables    728 

Bilharz  and  Schranz  jigs     641 

Braun  jig  and  Harz  eccentric  jig    641 

capacity  of  jigs    697 

of  trommels     360 

coarse  and  fine  crushing 2010 

complete  discussion  of  tube  and  ball  mills 2016 

concentrating  at  the  Perm  mine,  Westphalia  ...  1177 

zinc  and  lead     1177 

Dornberg  and  Aurora   concentrating    plant    at 

Ramsbeck,  Westphalia    1177 

German  mills    2034 

Groppel  concentrator     2023 

hand  picking  at  Ramsbeck,  Westphalia.     Cobb- 
ing table     492 

Himmelfahrt  ore  dressing     plant    at     Freiberg, 

Saxony    1177 

jigs  at  Lintorf     641 

in  Aurora  and  Dornberg  mills  in  Westphalia  . .  641 
Kavan-Rittinger,  vs.  Luhrig,  Stein  vs.  Bartsch 

tables    728 

laborforjigs 604 

magnetic  separation     /U/o 

in  Hungary 2040 

separators 834 

new  jig  screen 2021 

ore  dressing  at  Bad-Ems     1177 

Beuthen,  Silesia    1177 

Clausthal      H77 

Lintorf     H77 

Silberau,  Laurenburg,  and  Clausthal      ....  1177 

Pape-Henneberg  apparatus     

concentrator 

pneumatic  concentration     

pointed  boxes  in  Dornberg  and  Aurora  mill 
riddles,  trommels,  and  spiral  sieves  for  coal  . 

Schmidt  spiral  sieve     

Schranz  mill    296 

separation    836 

side  plunger  eccentric  jigs 641 

slimes  at  the  Himmelfurst-Fund  mine  at  Przi- 

bram     1177 

slime  tables     728 

Stein,  Schranz,  and  Rittinger  tables     728 


837 
837 
477 
385 
385 


11 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II, 


Blomeke,  C.  Stroke  of  jigs 594 

trommels  at  Bad-Ems      385 

use  of  wash  trommels    2018 

Wetherill  magnetic  separator      834 

Blower  for  Krom  jig    824 

Blow  of  gravity  stamps,  effectiveness  of     218 

Blue  Bell  mine,  British  Columbia,  proposed  method 

of  treatment  at  the     2042 

Bird  mill,  sizing  test  of  stamped  ore    222 

ground    1080 

treated  in  South  Africa     333 

weathered  at  Kimberley    830 

weight  of    1191 

Blue,  F.  K.    Experiments  with  launders    1594 

Boards,  covered  with  amalgam    747 

for  mill  building     1088 

to  catch  gold  on  dredges     1012 

Bobtail  mill,  mortars      164,    165 

rate  of  crushing  in      165 

weight  of  stamps  and  mortars      164 

Bodie,  amalgamated  plates  at      766 

plates  at     788 

stamps  at      227,  228 

Bogardus  eccentric  mill     233,  259 

mill     232 

bibliography  for    292 

Boggs  and  Clark  centrifugal  pumps  at  Mill  141    ...  1761 

Bohemia,  a  mill  in.     O.  Eypert    2047 

graphite  dressing  in      1 177 

mill  in     1075 

Bohme.     Strength  of  stone     316 

Boilers    1090 

in  mills  — see  Individual  Mills  in  Chapter  XX. . 

Boiler  tubes  for  launders    873 

Boiling  of  jig  beds     600 

point  of  mercury     730 

Bolivia,  tin  concentration  in.     J.  D.  Minchin    2038 

dressing  in  1084,  1183 

M.  Frochot    . .  2033 


.148, 


2040 

1854 

60 

60 

150 

882 

236 

299 

459 

221 

1309 

57 

640 

1175 

862 

60 

60 

784 

837 


W.  McDermott     

Bolthoff  rolls  at  Mill  166    

Bolton,  R.,  on  breakers     

Lancaster  breaker     

Bolts  for  stamp  mortars      

removal  of 

Bolzenmuhle      

bibliography  for    

Bonanza  Co.,  use  of  lime  for  settling     

mill,  details  of  stamps     

Bonita  Mining  Company,  Lane  slow-speed  mill  at 

Bonne  Terre,  Missouri,  breakers  at      

jigs  at     

mill  at 924 

Boot  for  elevators     

Booth  breaker  

combination  breaker    

Borax  for  melting       

Borchers,   W.     Concentration  plant  of  the  Sterling 
Zinc  and  Iron  Co 

Bordeaux,  A.     Costs  of  concentrating  lead  zinc  ores  2049 

Borgmann  and  Emde  revolving  grizzly  bars      386 

screen     386 

Bornite,  specific  gravity  of      1 189 

Boron,  atomic  weight  of     1188 

Borotungstate  of  cadmium      1156 

Bosco  drainage  boxes  at  Mill  113     1660 

settling  launders  at  Mill  113    1660 

sizers  at  Mill  142   1767 

Bosqui,  F.  L.     Cyaniding  at  the  Homestake  mills  .  .    1925 

definition  of  slimes     1398 

Montana  Tonapah  mill     2038 

treatment   at   the   Combination  mill,  Goldfield, 
Nevada     2045 

Boss  amalgamating  pan    242,  243,  244 

Bosses,  sockets  in     187 

table  of  details  of     186 

Boss,  I.  C.     Cantilever  battery  frame 1278 

M.  P viii,  244,  426 

amalgamating  pan    239,  244,  245,  246,  247 

battery  at  Mill  102    1630 

cam  key     1273 

cantilever    stamp-frame    at    Tonopah    Mining, 

Milling,  and  Development  Company    1272 

cone  classifier    425 

definition  of  slimes     1399 

individual  mortars    1265 

lever-operated  latch  finger  for  gravity  stamps . .  .    1273 

muller  and  shoes  made  by  . .  . 246 

on  slimes    1420 

the  Chili  mill    .  .   1323 


Boss,  M.  P.,  roller  mill 1313 

shoe  and  die  channels  in  amalgamating  pan  of.      247 

stamp  head    1271 

standard  battery     1267 

steel  stamp  battery  frame     2012 

wedge-grip  tappet  for  gravity  stamps      1272 

Boss  or  stamp  head    185 

pans    241,291 

steam  jackets  in      244 

system    290,  291 

of  pan  amalgamation 248,  779 

tubular  classifier     478 

Boston  and  Montana  Consolidated  Copper  and  Silver 

Mining  Company  mill    xxvi,   1841 

Boston  Consolidated  Copper  Company 1850,  1852 

and   Mining   Company  mill,   Garfield,    Utah. 

L.  H.  Beason    2038 

Nissen  stamps  at    1278 

-Richardson  Mining  Company     1620 

Bottle  agitator     1157 

amalgamation    1 157 

for  testing    1996 

Bottom  bed  in  jigs,  size  of  grains  of     575 

thickness  of      575 

material  for      573 

on  Faust  jig     548 

jigs,  denned     495 

for  amalgamating  pan     241 

ore  bins    842 

Boulder  County,  Colorado,  cost  of  mining  and  milling 

tungsten  ores  1987 

dry  separation  in    820 

Boulders  in  dredging    1011 

Bourdais  disintegrators    899 

Bournonite,  specific  gravity  of     1189 

Bower's  rolls     Ill 

Bowie,  A.  J.,  Jr 1197 

Blake  breaker  at  Father  de  Smet  mill    57 

Eureka  rubber  and  traps  in  the  Father  de  Smet 

mill      787 

Father  de  Smet  gold  stamp  mill    1 174 

gravity  stamps     224 

grizzlies  in  the  Father  de  Smet  Mill     385 

hydraulic  giants      334 

hydraulicking    1006 

hydraulic  mining     xix  1173 

mortars     164,  165 

on  grade  of  a  sluice     723 

riffles     721 

timber  riffle  blocks     721 

Box  classifiers   432 

surface  current    433 

whole  current    443 

distributors    857 

feed  for  Wilfley  table     1468 

traps,  Krupp  type     1516 

for  mercury      773 

Boxes  for  jig  concentrates     586- 

cam  shafts      190 

rolls     72 

in  launders     875 

Boys  for  picking     481 

Braden  Copper  Company  mill,  Chile.     W.  Braden    .   2039 

Bradford  eccentric  jig    500 

jig      334,   639 

washer 330 

Bradley,  F.  W viii 

Brass  battery  cloth,  Tyler  double-crimped     171 

for  jig  screens     545 

plate  for  jig  screens  at  Mill  141    1760 

screens    174 

Versus  steel  for  jig  screens    547 

wire  jig  screens  at  mills  ....  1686,  1714,  1743,  1744, 
1750,  1751,  1752,  1753,  1867,  1877,  1878,  1879,  1902, 

1903,  1904 

Braun,  Company,  F.  W.     Sample  grinders     1323 

jig   641 


double  discharge  on     .  . 

sample  grinder    

solution  

Bray  coal  screen  

Brazil,  mining  in.  W.  Maude 

stamps  in  

Brazing  of  amalgamated  plates 
Breakage  of  stamp  stems  .... 
Breakers,  action  of  

Alden  type      

Allis-Chalmers,  Gates  type 

American  rock     . 


584 

. . . 1279,  1284 

1156 

2018 

2035 

....227,  229 

735 

188 

55 

59,  61 

1222 

59 


12 


Archer  type 57,  58,  60 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Breakers,  at  Mill  144 1771 

attendance  in  Ontario  mill     57 

Austin  gyratory  breaker    1210 

table  of  sizes,  capacities,  power,  speeds,  weights, 

etc 1210 

Bartsch  type    61 

Baxter  type     56,  58,  60,  61 

between  feeder  and  stamps 2009 

bibliography  for    55 

Blake  and  Gates  compared    52 

challenge  type    20,  59 

design  of    *„ 1201 

Kley,  Gates,  McCully 55 

multiple  jaw    57 

type     13,  20 


Brennan  and  Young 
Colorado  Iron  Works 

duplex  breaker    

Friedrich  Krupp  Grusonwerk    

Fulton  Iron  Works     

Gates  Iron  Works    

Giant  Rock    

Hercules    rock    breaker,    Hendy    Machine 

Works     22 

Krom's  sectional  breakers     21 

lever  pattern    21 

Minnesota  Iron  mine     23 

Monarch  breaker    20 

Risdon  Iron  Works    22 

sectional  cushioned  crusher 20 

Union  Iron  Works  breaker     21 

Walburn  and  Swenson 23 

Booth  type 60 

breaking  point  for    49 

Brennan  and  Young 21,  59 

Brinje  type     58 

Brodie  type    60 

Brown's     56,  58,  59 

Buchanan  type 59,  61 

granulator    59 

universal  type    59 

Camroux  type    58,  61 

capacity  of     54 

powers,  etc 56 

Carterville  Foundry    &  Machine  Works  Blake 

breaker     1201 

Case  laboratory  breaker  of  the  Denver  Fire  Clay 

Company      1204 

champion  type    58 

classification  of  preliminary    1200 

Codman  type    58,  61 

Cole  type    59,  61 

Comet     41 

table  of  details  of     41 

comparison  of   57 

between  different  types  of .     A.B.Paul   2018 

of  jaw  and  spindle  types 51 

compound    57 

cost  of  crushing  by     49 

running     54 

Denver  Engineering  Works  Company.     Blake .      1203 
Company.     Blake.     Table  of  sizes,  capacities, 

power,  speeds,  weights,  etc 1204 

different  makes  of 2009 

Dodge  type 28 

double  acting 

Dragon  type 

duplex 

Dyckhoff  type     

effect  of  corrugations  on    . 
essentials  of     


excelsior  type 
Farrel- Blake. 


Table  of  sizes 


capacities,  power, 


speeds,  weights,  etc 1200 

fine  crushing  by    54 

Fprster  type 25,  57,  60 

friction  of     55 

Fulton  Iron  Works     22 

Gardiner  type   57 

Gates    36 

action  of     39 

cast-iron  head  center  for  gyratory     1220 

gunlock  manganese-steel  mantles  for  gyratory  1220 

Gates  Iron  Works    . . ; 23 

style  "K"    1207 

table   of  sizes,    capacities,    power,    speeds, 

weights,  etc 1208 

table  of  details  of     38 

with  short  head  and  concaves    1208 

table  of  sizes  and  capacities   1209 


Breakers,  general  consideration  about    47 

Giant  Rock    22 

Griffith  type    ',       59 

Gyratory,  range  of  adjustment  of    1218 

Hall  type 56,  57,  58 

Hathaway,  C.  L.     Gyratory     1215 

table  of  sizes,     capacities,     power,     speeds, 

weights,  etc 1217 

Hercules  rock,  Hendy  Machine  Works    22 

Hoagland     57 

Hope  type    61 

Humbpldt-Dodge  type     1206 

Engineering  Company.     Blake  breakers    1205 

in  coal  plant,  requirements  of   2009 

jaw  type      f 13,  25 

general  remarks  on    33 

Kennedy  gyratory     1213 

table   of   sizes,    capacities,    power,   speeds, 

weights,  etc 1214 

Krom,  movement  on  in  Mill  22    34 

type     56 

Krupp  gyratory     1215 

table  of    sizes,    capacities,    power,    speeds 

weights,  etc 1215 

rock  breaker    1202 

wearing  parts  for  jaw    1221 

Lancaster      59,  60 

large  versus  small     49 

Lester  type    56 

life  of  wearing  parts  of  Farrel-Blake  at  Mill  139  1221 
McCully  gyratory  breaker  at  Mill  139  ....    1222 

Lowry  national     45 

type     58,  59,  60 

McCully  gyratory    44,  1210 

at  Mill  139 1213 

manganese-steel,  self -tightening  mantle  for.    1213 

table  of  sizes  of 44 

table   of   sizes,    capacities,    power,    speeds, 

weights,  etc 1212 

Marsden  fine  breaker    56 

type  56,  58,  60 

Minnesota  Iron  mine     23 

Monarch  (Blake  type)     20 

Motte's  type    58 

movements  of  jaw 23 

multiple  jaw  type     28 

National  Drill  and  Manufacturing  Company's 

Blake  breaker     1203 

New  Century  Blake 1203 

number  used     51 

Phelps  type    59 

power,  cost,  capacity,  and  weight      52 

quality  of  crushing  by     47 

Risdon  Iron  Works    22 

rock     13 

Royal  type  58 

run  by  hydraulic  power     60 

Rutter     45 

Samson  breaker    1202 

at  Dives-Pelican  mine,  1203 

table  of  sizes,  capacities,  power,  speeds,  weights, 

etc 1203 

Schranz     31,  57,  60 

sectional  Krom's     21 

section  of  Krom's  standard    31 

size  and  shape  of  mouth     54 

of  crushed  product     1218 

Monarch    21 

speed,  capacity,  and  power     53 

spindle    having    largest    movement    on    largest 

lump 1215 

or  gyratory  type 36 

table  of  comparative  tests  of    45 

details  of    46 

Sturtevant-Dodge  type  breakers 1205 

table  of  sizes,   capacities,    power,    speeds 

weights,  etc 1205 

roll  jaw  breaker 32,  1205 

breaker     1205 

Taft  type     61 

taper  of    52 

Taylor  hand    59 

tests  of    59 

Thomas  type     57 

Union  Iron  Works    21 

water  used     49 

wearing  parts  for    48 

wear  of  Dodge    31 

Western  Wheeled  Scraper  Company     25 

Wolf's    66,  58 


13 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Breaking  before  stamping  in  California 1619 

by  hammers 9 

with  or  without  hand  picking     9 

cost  of 50 

at  Mill  162 1222 

crushing,  comminuting 8 

details  of  cost    51 

for  hand  picking     1435 

general  considerations  about    47 

hand  and  machine  compared 12,  56 

pieces  for  breakers     2009 

Breast  water  wheels     1090 

Breccia,  andesitic,  crushed  at  Florence,  Colorado  . . .  103 

Breckenridge,  Colorado,  ore  crushed  in  Griffin  mill  .  284 

Breinigerberg  mill,  jigs  in     597 

mine,  jig  eccentrics  at      532 

Brennan  and  Young    1055 

breaker 59 

Blake  type 21 

Brewer,  W.  M.     Log  washer  plant  in  Alabama    ...  1180 

settling  in  liquids      1183 

spray  pipe  for  trommel    385 

Brewster,  New  York,  mill  at      1180 

Briart  bar  screen     346,  384,  385 

movable  grizzly  bars    386 

Brick  and  stone  for  mills 1088 

Bridgman,  H.  L.     Bridgman  mechanical  samplers  .  .  884 

sampler 2032 

Bring,  G.  G.    Action  of  sands  in  classifiers  and  jigs  .  2020 

investigations  of  suction  in  jigging   1461 

study  of  jigs    1463 

Brinje's  breaker 58 

Brink  &  Hiibner  disintegrator 236,   284 

bibliography  for 298 

capacity  of,  at  Mannheim     286 

Brinsmade,  R.  B.     Concentration  in  Southwest  Mis- 
souri    2041 

description  of  marble  working  machinery    2027 

pyrite  milling  in  New  York      2037 

the  Combination  Mountain  mill,  Montana 2042 

mill  of  the  North  American  Lead   Company, 

Missouri     2042 

Union  mill,  Gratz,  Kentucky     2038 

Briquetting  iron  concentrates 1054 

ore     .                                                                  .  1057 


Britannia  Beach.    Hancock  jig  at 1441 

Copper    Company,    B.   C., 
R.  Stokes 


the    mill    of    the, 

2046 

United  mill,  acid  water     173 

amalgamated  plates  in     745 

amalgamation  in 768 

British  Columbia,  concentration  at.     R.  Bell 2034 

concentration   in  the  Kootenay  district.     E.  R. 

Woakes '. 2034 

dredging  in    1009 

history  of  mining  in.    H.  M.  Lamb     2035 

hydraulic  minings  in 2033 

jigging  five  minerals  in 591 

milling  at  Roseberry.    A.  W.  Dyer    2035 

mills 2034 

notes  on.     L.  Jordan      2033 

milling  at  the  Slocan  district.     S.  S.  Fowler ...   2034 

ore  dressing  in  the  Slocan  district.    P.  Argall 2042 

British  imperial  wire  gauge 1195 

Brittain,  D.     Milling  the  sheet  ore  at  Joplin 2039 

Brittleness  of  minerals,  effect  of    2 

under  crushing  force    1611 

use  of  made,  in  mills     891 

Brodie  breaker    60 

Broken  Hill,  Collom  jig  at   515 

concentration  at.     D.  Clark     1568 

at.    T.  J.  Greenway     2040 

concentration  of  lead  ore  at.  V.  F.  S.  Low. 2037,  2038 

cost  of  producing  lead  and  silver  at   1964,  1965 

DeBavay  flotation  process  at    1562 

Hancock  jig  at    504 

jigs  at 643 

metallurgy  at     1568 

milling  practice.     G.  Delprat     2038 

R.  Stokes      2046 

milling  practice    2039,  2047 

mills  at    1136,  1182 

ore  dressing  at.     G.  D.  Delprat    1923 

Potter  and  Delprat  flotation  processes  at     1561 

Proprietary  Company,  report  of  the   2048 

separation  of  galena-sphalerite  ores  at    1611 

stamps  at 227 

steam  stamps  at 1 42 

water  used  at     1 104 

Broken  ore,  weight  of 1190 


Bromilow  magnetic  separator    836,  2027 

Bromine,  atomic  weight  of 1 188 

Bromly,  A.  H.     Weight  of  ore  crushed  for  cyaniding.  1 181 

Bromyrite,  specific  gravity  of  1189 

Bronze  for  jig  screens      545 

screens    355 

screens    174 

Brooke,  feeding  Ball  mills    1302 

Brooke,  H.  J .     Best  size  of  feed  for  ball  mill   1323 

Brookfield  Mining  Co 1166 

Brookite,  specific  gravity  of    1189 

Brooklyn  Chrome  Steel  Works    183 

Broom  for  amalgamated  plates      758,  760 

buddies       705,  707 

canvas  tables      701,  702 

German  sweeping  table     704 

Brough,  B.  H.     Concentration  at  Svarto,  Sweden. . .  1185 
magnetic  concentration  plants  in  Sweden    .... 
Wenstrom  separator  and  plant  at  Svarto,  Sweden 

Broughton  Asbestos  Company  magnet,  the     

Brown  &  Sharpe     

gauge  


screen  gauge 
breaker     . 


1179 
834 
1532 
1195 
1194 
172 
45 
1189 
1323 
1587 


coal,  specific  gravity  of 

F.,  Importance  of  fine  grinding     

R.  G.      Details  regarding  Frenier  sand  pumps 

plates  and  traps  at  Bodie,  California 788 

pumps  for  handling  pulp 1610 

stamps  at  Bodie,  California 227 

spindle  breaker     56,  58,  59 

Browne  hydrometric  conical  sizer      409 

sizing  of  products  of    410 

Brownell  Frue  vanner     2023 

vanner  belt    647 

Browning  crane  hoist  at  Mill  165 1852 

F.  D.     Plates  in  Providence  mill    789 

stamps  at  Providence  mill,  Nevada  City,  Cali- 
fornia      230 

Brucite,  specific  gravity  of    1189 

Bruckner  ball  mill      233,   260 

bibliography  for    293 

Brunswick  mill,  wear  of  amalgamating  pans    249 

Brunton  belt  table    698 

man  elevator     2032 

revolving  furnace    1082 

Brunton,  D.  W.  concentration  by  free  settling 475 

principles  of  sampling    1575 

rock  house     485 

roll  shims 74 

sampler    847,  1572,  2032 

requisites  to  accuracy  when  using     1575 

sampling     850,  884 

Brush  for  dressing  amalgamated  plates 756,  760 

Brussels  carpet  in  sluices    1008,  1012 

for  tables 703 

on  tables     750 

Bruyn  slime  separator    2020 

Bryan  mills  at  Mill  173     1879,  1928,  1929,  1930 

bibliography  for    295 

data  on.     D.  W.  C.  Nelson     2013 

in  Cananea  for  re-grinding 2016 

number  used     231 

sizing  tests  on.     F.  P.  Probert 1323 

product     1310 

pulp  from     1317 

tailings    273 

versus  high-speed  rolls     1309 

Huntington  mill    273 

rolls.     F.  P.  Probert    1323 

stamps 273 

Bryan  roller  mill 234,  271 

quartz  mill,  dimensions  of 272 

Bryant,  W.  G.     Discussion    of    design    of     Blake 

breakers     1201 

Buchal,  L.     Pointed  boxes  at  Przibram    478 

rope  driver  for  stamps  at  Przibram    229 

stamps  at  Przibram 229 

Buchanan  breaker       59,  61 

at  mills 1818,  1891,  1913 

table  of  movements  of  old 23 


1178 

59 

803,2028 

23 

23 

72 

....1819,  1891 

59 

Buckbee,  A.,  on  silver  milling  1040 


C.  G.      Magnetic  concentration 

granulator    

magnetic  separator 

rock  breaker    

of  Blake  type    

rolls     

rolls  at  mills    

universal  breaker 


14 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Bucket  conveyor     290 

dredge    1008,  1011 

elevators     862 

sample 845 

Buckets,  elevator,  materials  for 864 

for  elevators     864 

Buckeye  engine      910,   920,   941 

Bucking  board    1137 

King's    1285,  1323 

samples     1578 

Buckskin  for  squeezing  amalgam    781 

Buckstaves  for  gravity  stamps    154 

Bucyrus  dredge    1011,  1653 

close-connected  type       1654 

Buddie  jig      518 

Buddies    8 685,  704 

bilbiography  for    727 

building    1464,  1507 

convex  Cornish,  at  Mill  185 1916 

Dodd 1481 

rectangular     706 

round  concave     706 

convex     704 

tye  707 

Buffalo  Hump  Mining  Co.,  mill    954 

Tiger  and  Poorman  Branch  mill       xxvi 

Buffer  for  feeding  gravity  stamps    199 

Bugbee,  E.  E.     School  laboratory  work,  a  free  mill- 
ing gold  ore     2048 

Buhrstone  mill    232,  252 

bibliography  for 291 

versus  Griffin  mill     297 

Building  buddies    1464,  1507 

tables    685,  704 

Buildings,  construction  of 1088 

for  mills   1086,  1087 

Bulkley  condenser    1027 

Bullfrog  cyanide  mill.     E.  R.  Avres     2038 

Bullion  Beck  and  Champion  Mining  Company  mill. xxvi, 

926 

Bullion  contents  of  amalgam 783 

fineness  of    763,  785 

Bull  jigs  at  Mill  121    1685 

Bumping  ore  feeder      854 

tables     667,   1464,   1497 

amalgamated  plate  on     740 

Bartsch  . . . .' 691 

compared   682 

depth  of  bed 1510 

details  of  in  the  mills 682 

end-bump  tables 680 

Hendy  concentrator   683 

principle  of 644 

Bunker  Hill  and  Sullivan  mill    . . .  .937,  1183,  1680,  2041 
Mining  and  Concentrating  Company  mill . .    xxvi 

Burdon,  J.  A.,  Brunton  belt  concentrator    728 

Burgan  classifier,  The  A.  L 1371 

Burke,  Idaho,  mill  at 954 

Burlap  filter 879 

for  filtering  dust    883 

tables  on  dredges    1012 

Burlingame,  E.  E.,  figures  on  sampling 852 

rules  for  sampling 848 

Burnett  and  Newbegin  coal  washer 2018 

Burt,  E.,  definition  of  slime 1397 

fine  grinding  at  El  Oro     2013 

milling  at  El  Oro   2046 

Burt  filter  presses  at  Mill  118 1678 

Burthe,  P.  L.     Gravity  stamps 224 

silver  milling  in  the  United  States 1176 

Varney  pan    291 

Buss  patent  L.uhrig  slimer 1496 

slime  table.     E.  Walker 2022 

tables  at  Mill  185 1915 

Butte  and  Boston  Consolidated  Mining  Companies  .    1836 

mill,  cost  of  die,  etc.,  at    121 

Huntington  mill  in 281 

Mining  Company,  mill xxvi,    976 

Reduction  Works,  test  on  ore  at   674 

Butte,  Montana,  concentration  at.     C.  W.  Goodale  2035 

cost  of  milling  at 1130 

hammers  used 10 

improvements  in  concentration  at.  A.  H.  Wethey  2036 

jig  losses  at 640 

launders  at 875 

mills  at 976,  978,  982,  987,  1119,  1175,  1176 

ore  dressing  at.     C.  W.  Goodale 1419 

ores,  concentration  of.     C.  W.  Goodale 2042 

crushed  by  rolls 110 

by  steam  stamps 135 


15 


Butte,  Montana,  ores,  sizing  tests  on    180 

Reduction  Works    1849 

mills xxvii,     987 

Wilfley  table  at 674 

Butters'  and  Mein  pulp  distributor  at  Mill  117 1670 

distributors  at  Mill  106   1641 

Butters  centrifugal  pumps  at  mills.  .1671,  1672,  1674,  1677 
Butters,  Chas.     Coagulation,  concentration,  and  set- 
tling of  slimes   1184 

cyaniding  at  El  Oro 1924,    2040 

figures  on  sampling 852 

re-grinding  tests  on  sands    2014 

rules  for  sampling 849 

valuable  tube  mill  experiences  in  El  Oro 2016 

filter  boxes  at  Mill  101 1627 

pan,  bibliography  of  . .  .  . '. 293 

patent  amalgamating  pan   233 

vacuum  filter  boxes  at  Mill  102 1630 

Biittgenbach,  P.     Glass  jig llgl 

on  testing  jigs    1151 

Buttgenbach's  classifier   479 

pointed  boxes 478 

hydraulic  classifiers 476 

separator  (classifier) 447 

Byron  Jackson  centrifugal  pumps  at  Mill  103. .  1632,  1633, 

1662,  1673 


Cabarceno,  Spain,  mill  at 1182 

wash  trommel  at 330 

Cactus  mill,  Newhouse,  Utah 1924 

L.  A.  Palmer 2041 

Cadmium  amalgan 730 

atomic  weight  of 1188 

specific  gravity  of   1189 

Caesium,  atomic  weight  of 1188 

Caetani  and  Burt.     Treatment  of  gold  ores   in  dry 

districts 1419 

Caetani,  G.     Comparison  of  stamps  and  Hunting- 
ton  mills 1262 

definition  of  slime 1397 

test  of  classifier  jig  at  Mill  120 1452 

Calamine  mill 1739 

specific  gravity  of  1 189 

Calcining  for  friability 9 

Ammeberg,  Sweden  9 

in  North  Carolina 9 

with  or  without  quenching  with  water   9 

for  magnetism 1544 

Calcite,  angle  of  nip  required  to  crush 94 

decrepitation  of 829 

specific  gravity  of   1 189 

Calcium,  atomic  weight  of    1188 

chloride,  a  heavy  solution  for  testing 1993 

sulphate,  removal  of  by  heat    816 

Calculation  for  pebble  charge  in  tube  mills,  formula 

for.     G.  P.  Scholl 2015 

of  classifier 401,  429 

magnets 793 

middlings  into  finished  products 1164 

settling  tanks 454 

Caldecott,  W.  A.  and  S.  H.  Pearce 1292 

crushing  efficiency  of  tube  mills 1323 

colloidal  silicic  acid  in  slimes 1619 

costs  of  fine  grinding   2015 

definition  of  slimes 1398,  1399 

discussion  of  fine  grinding 2014 

lime  in  settling  slimes  in  South  Africa   1178 

tube  milling  grinding  in  South  Africa 2014 

use  of  lime  in  slime  settling    1416 

Caldwell,  H.  W.    &  Son  Company.    Drag  or  disc 

conveyors   1583 

helicoid  conveyor 1582 

screw  conveyor    1582 

Caledonia  mill 183 

amalgam  in   783 

comparison  of  Gates'  and  Blake  breakers  in. .  54 

details  of  screen  in 170 

dies  used  in   _ 180 

dimensions  of  mortars  in 165 

fineness  of  bullion  in 785 

loss  in  melting  at    784 

mortar 228 

mouth 167 

mortars 164,  165 

rate  of  crushing  in 165 

running  cost  in    54 

screen  frame 177 

weight  of  stamps  and  mortars    164 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Calico,  California,  amalgamating  pan  at   290 

California,  chromite  mill  in 1074 

concentration  of  auriferious  sulphides  in    2043 

cost  of  gold  milling  in   1131 

producing  gold  in 1977 

dredging  in 1009 

gold  milling  in  Nevada  county.     H.  F.  Brown.  .  2043 

gold  mills  in 1177,  1178,  1181 

gold  mills,  modern  practice  in   1619 

gravity  stamps 138 

milling  practice  at  Hedges 2044 

mill,  number  and  height  of  drops  in 214 

mills  in 1182 

number  of  pulverizers  in 231 

silver  mill,  Nevada 1174 

stamp  mill    144,  2043 

stamps  225,  230 

in 226,    229 

origin  of  2012 

•versus  Colorado  and  steam  stamps 134 

Colorado  stamp  mills   215,  220,  1030 

suggestion  for  milling  of  gold  ores.  N.  H.  Storms  2034 

system .224,    227 

of  stamp  milling 1030 

Caliper,  Snyder  micrometer 1362,  1366 

Gallon,  J.     Comparison  of  different  crushing  machines  315 

Engis  machine  and  Krom  jig 837 

Engis,  Thirion,  and   Dorr  hydraulic  classifiers. 

Siphon  separator 475 

gravity  stamps 223 

hammers  and  breakers 55 

jaw  breaker 55 

lectures  on  mining xix 

mill  schemes 1173 

movable  sieve  hand  and  machine  jigs,  Harz  jigs  .  639 
percussion   tables,    buddies,    slime    tables,    and 

kieves    727 

rolls  and  stamps   109 

sieve  scale,  trommels    384 

value  of  hand  picking    492 

Callow  cones 1402 

at  mills 1632,  1660,  1687 

computation  for 1404 

on  Cceur  d'Alene  galena  slimes   1404 

test  on  Butte  copper  slimes 1404 

J.  M.  Callow  traveling  belt  screen 2018 

flow  sheet  of  mill  using  Callow  machines  . .  .  2020 

pulp-thickening  and  settling  tanks  at  Mill  114.  .  1662 

screens  at  mills. .  .1661,  1662,  1684,  1687,  1689  1725, 

1726,  1738,  1760,  1794,  1795,  1833 

capacity  of  to  various  meshes 1360 

water  in  feed  to 1360 

settling  tanks  at  mills 1689,  1711,  1712 

slime  and  water  cones    1367 

sloughing-off  tanks  at  mills 1662,  1687,  1689 

system  of  ore  concentration.    J.  M.  Callow   . . .  2045 

tanks 1420,  2020 

at  mills..  1683,  1684,  1846,  1848,  1851,  1852,  1867, 

1868 

saving  effected  at  Mill  163  1848 

traveling  belt  screen 1358 

J.  M.  Callow T 2015 

Calumet  and  Hecla,   jigs  at.     (See  also  Mill    177.) 

1440,  1446 

mill   142,  990,  1184 

Huntington  mill  in 281 

Krause  stamp    141 

mortar  housing  lining  for  stamp    120 

steam  stamps 120 

Mining  Company   141,  1891 

copper  handbook 1925 


3pper  J 
nil    . . 


xxvn 

sizing  tests  in 259 

sand  wheel  867 

type  Chili  mills  at  Mill  177 1893,  1894 

classifier    391 

at  Mill  166 1855 

Michigan,  mill  at 990 

mill  1892 

or  Richards-Coggin  classifier    1367 

tables  at  Mill  177 1894 

Cam  and  gravity  for  jig  mechanism 506,  537 

in  Stutz  jigs  537 

and  spring  jig  mechanism    507,  537 

shaft  for  gravity  stamps 190 

Krupp 1272 

spring  and  bumping  post  for  tables 680 

mechanism  667 

stick 200 

template  193 


"Camel  Brand"  elevator  belting  at  Mill  175 1889 

Cameron  pump   872    898 

Cammett  table 676    680  2022  2023 

Campbell  coal  washing  table.     C.  R.  Claghorn 2023 

washer 2023 

Camp  Bird  mill 1623 

Ouray,  Colo.     S.  L.  Goodale 2037 

T.  H.  Woods,  G.  D.  Doveton   2033 

Camroux  breaker 58,  61 

Cams 191,  1272 

Bally  balanced 226 

Blanton  and  other  self-tightening 193 

Boss  cam  key 1273 

Canda  cams  for  gravity  stamps  1273 

design  of 196 

for  gravity  stamps 191 

friction  and  lubrication  of 194 

inscribing  circles  and  clearances 196 

lateral  thrust  of 195 

right  and  left  hand 195 

self-tightening    193 

stamp  mill  cam 201 1 

table  of  details  of   192 

Canada,  chromite  mill  in    1074 

Corundum  Co.,  mill 1078,  1183 

Cananea,  C9ncentration  at.     D.  E.  Woodbridge 1923 

Consolidated  Copper  Company   1875 

power  tests  at 1927 

Sonora,  Mexico,  mill  of  the.  O.  P.  Finley  2045 

ore  dressing  at.    D.  E.  Woodbridge 1419 

type  Blake  breaker  at  Mill  151    1802 

Canby  dust  separator  at  Mill  151    1803 

R.  C.,  separation  of  mixed  sulphides 1923 

Sutton-Steele  dielectric  separators   2027 

process    1568 

Canda  cams 1273 

at  Mill  143 1769 

stamp  mill  cam  2012 

steel  jaw-plates  for  Blake  breakers  at  Mill  139  . .  1749 

at  Mill  166 1853 

Canisteo  district,  Minnesota,  washing  iron  ores  in'. .  1815 

Cannon  ball  mills,  number  used    231 

Canon,  Arizona,  gasoline  engines  at 1091 

Cantilever  crane  at  Mill  171  for  removing  tailings  .  .  1870 

Canton  flannel  tables  on  dredges 1012 

Malleable  Iron  Company,  iron  balls  for  jig  beds  1458 

Canvas  belt  tables 698 

belts 1094 

conveyor  belt,  Leviathan 1585 

elevator  belt  at  Mill  125  1700 

for  squeezing  amalgam '  781 

plant. . .  1017,  1021,  1029,  1035,  1037,  1038,  1101,  1110 

at  Garnet,  Montana.     P.  S.  Mussigbrod 2036 

cost  of 1 126 

failure  of 1029 

results  at  Mill  101 1628 

test 1165 

shield  for  stamps 177 

surface  for  slime  tables 695 

sweeps  for  buddies 705,    706 

tables 700,  1037,  1464,  1507 

at  mills 1696,  1755,  1779 

bibliography  for 729 

details  of,  in  mills 703 

for  testing 1155 

new  Dimmick  patent  slime  table  1507 

on  dredges   1012 

vanner  belt 650 

versus  rubber  for  vanner  belts    650 

Capacities  and  speeds  of  picking  tables  and  belts 1438 

of  Abbe  tube  mills  at  Mill  101 1626 

air  classifiers  at  Engis    818 

Akron  Chili  mills,  table  of 1308 

Allis-Chalmers  rolls  at  Mill  179 1898 

suspended  frame  vanners 1503 

toothed  and  corrugated  rolls,  table  of 1243 

Alsing  cylinders 267 

amalgamating   pans ; 243 

American  Process  Company's  driers 1598 

Argall  driers 881,  1600 

arrastras   238,    239 

Atwood  amalgamators 776 

Austin  gyratory  breakers,  table  of 1210 

ball  mills 261 

at  Mill  159 1828 

Ball-Norton  belt  type  separator  at  Mill  158  . .  1824 

magnetic  separators    '. 1528 

magnets 798 

Bartlett  picking  tables 489 

simplex  concentrators 1487 


16 


Pages  1199-1610,  Vol.  III. 


Capacities  of  Bartsch  rotary  percussion  table 1497 

belt  conveyors  at  mills.  .  .  1667,  1670,  1681,  1690, 
1691,  1707,  1708,  1709,  1771,  1772,  1828 

percussion  table 1496 

Bilharz  jigs  504,  518 

tables 504 

Blake  breaker  at  mills....  16 18,  1621,  1742,  1749, 
1769,  1792,  1802,  1853 

breakers  17,  21,  24 

Blake-Morscher  electrical  ore  separator 1551 

blanket  concentrating  tables  at  Mill  118 1677 

blende  jigs  of  Southwest  Missouri 602 

Bogardus  mills 260 

Boggs  and  Clark  centrifugal  pump  at  Mill  141  1761 

boilers  1091 

box  classifiers 433 

breakers 53,  56 

at  Mill  144 1771 

in  Caledonia  mill  54 

Brink  and  Hiibner  disintegrators  286 

Browne  hydrometric  conical  sizers 410 

Browning  crane  hoist  at  Mill  165 1852 

Bryan  mills  272,  273 

at  Mill  173 1879 

Buchanan  magnetic  separators 803 

bucket  conveyors 861 

elevators 864 

Bucyrus  dredge 1654 

buhrstone  mills  253 

Butters'  centrifugal  pump  at  mills 1671,  1672, 

1674,  1678 

Biittgenbach's  separator 447 

Byron  Jackson  centrifugal  pumps  at  mills.  . . .  1662, 

1673 

calcining  furnace  at  Friedrichssegen  1546 

Callow  conical  tanks  at  Mill  122 1687 

screens  at  mills 1661,  1662,  1687,  1795 

to  various  sizes  1360 

sloughing-off  tanks  at  Mill  122 1687 

Calumet  and  Hecla  type  Chili  mills  at  Mill  177  1893 

classifiers 401 

canvas,  blanket  and  carpet  tables  703 

tables 701,  702 

at  mills 1627,  1779 

Carr  disintegrators  285 

Castelnau  belt  tables 700 

centrifugal  pumps 869 

at  mills..  1688,  1694,  1695,  1696,  1721,  1880, 
1890,  1904,  1905 

challenge  feeders  at  Mill  174 1883 

Chili  mills  269,  270 

at  Mill  179 1898 

chip  screens  at  Mill  173 1879 

clarifying  reservoirs 460 

tanks  at  Mill  138 1743,  1744 

Clarkson-Stanfield  centrifugal  separators 820 

classifiers 403,  405,  432 

at  mills 1878,  1879,  1880,  1902,  1903 

clay  washers 1076 

Cleveland-Knowles  magnetic  separators 1542 

cobbing  magnets  at  Mill  164 1850 

Comet  breakers  41,  46 

compound  steam  stamp  at  Mill  181 1906 

cone  mills 256 

conical  trommels  at  Mill  180 1902 

Conkling  jigs 503 

convex  buddies  705 

conveying  and  picking  belt  at  Mill  139 1749 

conveying  belts  at  various  mills  1585 

crushing  machinery 2010 

Cummings  granulating  mills 255 

Cyclone  beaters  at  Mill  186 1917,  1918 

Cyclone  dust  settlers  at  Mill  105 1637 

pulverizers  289 

decrepitating  furnaces 829 

Dellvik-Grondal  magnetic  separators 804 

Denver  Engineering  Works  Company's  Blake 

breakers,  table  of ' 1204 

dewatering  wheel  at  mills  . . .  1772,  1773,  1878,  1879 
Dings  magnetic  separator 1541 

at  Mill  140 1759 

distributor  at  Mill  126  ..  .  1707 

Dodd  tables  at  Mill  96 1618 

Dodge  breakers 30 

pulverizers  262 

double  cone  classifiers 427 

drag  or  disc  conveyors 1584 

dredges 1007,  1008.  1011 

driers 880,  882 

drying  floors  versus  mechanical  driers 1596 


INDEX.  Pages  1611-2052,  Vol.  IV. 

Capacities  of  Edison  driers 882,  1600 

magnetic  separators    813 

elevator  at  mills 1661,  1663,  1667,  1685,   1690, 

1707,  1727,  1728,  1729,  1749,   1750,  1752     1753 
1755,  "1771,  1772,    1774,  1829,  1842,    1843    1844 
1845,  1846,  1847,  1853,  1854,  1877,  1880,  1898 

Ellenbecker  bumping  tables    681 

Elmore  vacuum  oil  process 1558 

Eureka  rubbers 777 

Evans  classifiers    .'     395 

slime  tables  at  Mill  177 1893 

Parrel  Blake  breakers,  table  of    1200 

Faust  jigs     548 

Ferraris  ball  mill 1300 

belt  tables 698 

classifiers      401 

patent  tables,  table  of    1490 

fixed  screens 341 

flotation  vats  at  Mill  129 1718 

Forsgen's  electromagnetic  separator 1539 

Forster  breakers 28 

Frayer  centrifugal  pump  at  Mill  159 1829 

Frenier  spiral  sand  pump   871 

Frisbee  Lucop  mills 267 

Frue  vanners  at  mills.  1662,  1694,  1695,  1711,  1712 

1755,  1880 

furnaces  roasting  for  magnetism 814,  815 

Gates  and  McCully  breakers 45 

ball  mills,  table  of    1301 

Gates  breaker  on  "choke  crushing" 48 

breakers    38  46 

at  mills  1635,  1661,  1706,  1710,  1727,  1728,  1853 
breaker  with  short  head  and  concaves,  table  of  1209 

style  "K "  breaker,  table  of 1208 

Gebruder  Sulzer  centrifugal  pumps  at  Mill  1 18     1678 

German  sweeping  tables 703 

Geyer  slime  settlers 460 

G.  G.  Gates  classifier 418 

Gilpin  county  bumping  tables    681 

Golden  Gate  tables      681 

Gould  centrifugal  pump  at  Mill  139 1757 

gravity  stamp 148 

Griffin  centrifugal  stamp  mills     269 

mills  at  Mill  105 1636 

roller  mill     284 

Grill  four-compartment  driers 1596 

ginding  pans  at  Mill  105 1638 
rondal  magnetic  separators 1537 

Hadfield  gyratory  breakers  at  Mill  130  1719 

Hallett  table 676 

Hancock  jigs  505,  1441 

at  Mill  127 1710 

on  Montana  copper  ores 1442 

hand  jigs  499 

Hardinge  tube  mills 1296 

Harz  jigs  at  mills  ....  1772,  1773,  1774,  1775,  1877, 

1878,  1879 

Hathaway  gyratory  breakers,  table  of 1217 

Heberli  magnetic  separators  799 

mills      257,    259 

wet  magnetic  separators 810 

Heberwasche 520 

Hendy  concentrators 683 

Hochstedt  apparatus  817 

Hodge  and  Cleaves  sand  pumps  at  Mill  182. .  1910, 

1911 

jigs  at  Mill  180 1902,  1903,  1904,  1905 

Hooper  air  jigs  822 

vanning  jigs  505 

Huntington  mills  280,  281 

at  mills..  1669,  1686,  1687,  1694,  1701,  1711, 
1753,  1869,  1897 

with  various  screens  1314 

Husband  pneumatic  stamps  141 

Imperial  screens,  table  of  1350 

International  magnetic  separator 1535 

James  slimer  1492 

Jeffrey  swing  hammer  pulverizers,  table  of . .  .  1322 
jigs 507,  596,  597,  599 

affecting  number  of  sieves 589 

at  mills. .  1685,  1686,  1692,  1693,  1694,  1707,  1708, 

1909 
Johnston  vanners  1502 

at  Mill  117 1669 

Kennedy  gyratory  breakers,  table  of  1214 

Kent  roller  mills 1304 

King  screens  1357 

Knowles  duplex  vacuum  pumps  at  Mill  117. .  1673 

New  Century  magnetic  separators,  table   of  1542 

triplex  pump  at  Mill  114    1674 


17 


Pages  1-643,  Vol.  I, 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Capacities  of  Krause  pneumatic  stamps . . 
Krom  air  jigs 


Krupp  gyratory  breakers,  table  of 
""ilfle 


141 

824 
1215 
1991 
390 
274 
1510 
1779 


laboratory  Wilfley  tables. 

Lake  Superior  hog  trough  classifiers 

Langley's  dry  crushers     

La  Point  flour  gold  separators,  table  of     ... 

Latta  and  Martin  pumps  at  Mill  144 

launders     875,  878 

Linkenbach  pointed  boxes 412,  441 

V-box  classifiers      421 

log  washers    321,    324 

Macquisten  tubes   1565 

magnetic  separators  at  Monteponi   810 

Przibram 812 

Mathey  roasting  furnaces  at  Mill  148    1793 

May  Brothers'  jigs  at  mills     1714,    1720 

McCully  breakers     44 

at  Mill  139 1749 

diagram  of 1212 

gyratory  breakers,  table  of 1212 

Meinecke  spitzlutten 425 

men  in  cobbing 480 

spalling 11 

mill  bins     842 

mills xxv,  1100 

in  reserve   1109 

See  Individual  Mills  in  Chapter  XX. 

Monadnock  Chili  mills  at  Mill  144 1775 

Morris  centrifugal  pump  at  Mill  139 1757 

Mumford   &  Moodie  dry  separators 818 

Narod  pulverizers 282 

Newaygo   separators  with  various    sizes    of 

Screens   1351 

New  Humboldt  concentrator    1494 

New  Standard  concentrator    1479 

Nissen  stamps  at  Mill  165 1264 

Nordberg  stamp  at  Mill  179    1897 

steam  stamps 997 

steeple  compound  steam    stamp   at   mills     1894, 

1895,  1901 

Overstrom  tables  at  mills     1711,    1730 

Oxland  furnace  at  Mill  137 1549 

Pape-Henneberg  dry  separators    820 

Parsons  &  Fisher  jigs 518 

tables 669 

Payne  magnetic  separators   800 

Perserverance  furnaces  at  Mill  105 1637 

Phoenix  atmospheric  stamps     141 

Pierce  amalgamator   1517 

Pilling  air  hoists,  table  of    1609 

pulp  thickeners  at  Mill  173    1880 

pulverizers 232,    326 

pumps 872 

rectangular  buddies    707 

revolving  knife  buddies   329 

Riblet  aerial  tramway  at  Mill  124 1696 

Richards'  annular  classifiers 406 

at  Mill  127 1710 

-Coggin  classifiers 392,  393 

at  Mill  173 1878,  1879 

hydraulic  classifier  at  Mill  159 1829 

pulsator  classifier,  table  of      1390 

jig,  table  of    1455 

vortex  classifiers  at  mills. .  1692,  1693,  1694,  1774, 

1776,  1778 

Richardson  automatic  scales  at  Mill  132 1727 

rigid  rolls  at  Mill  181   1906 

Rittinger  Spitzkasten 440 

tables 668 

roasting  furnace  at  Mill  138 1747 

Robins  belt  conveyors  at  mills    .  ,.1636,  1750,  1876 

conveying  and  picking  belts  at  Mill  132  ...     1727 

rock  emery  mills     255 

rolls     , 64,  100,  1226 

at  mills. .  1667,  1686,  1714,  1727,  1743,  1749,  1750, 

1751,  1771,  1773,  1774,  1792,  1793,  1829,  1854, 

1877,  1879 

diagram  of        1228 

rotary  driers  at  Mill  186   1917 

round  tables  at  mills    1904,    1905,    1908 

runs 448 

Samson  breakers,  table  of 1203 

sand  wheels   865,    866 

at  mills 1668,  1669,  1894 

formula  for 1586 

Sautter  magnetic  separators    798 

Schmidt  spiral  screens 363 

Schrans  jigs 503 

mills 275,    276 


Capacities  of  Scoby  sampler  at  Mill  173 1880 

scraping  conveyor  at  Mill  114   1662 

screw  conveyors,  table  of    1583 

settlers 778 

settling  tanks     455 

shaking  feeders  at  Mill  124 1691 

grizzly  at  Mill  124 1690 

screens 342,  345 

Sherman  re-grinders  at  Mill  132 1728,  1729 

Siemens  and  Halske  magnetic  separators 799 

separators 804 

simple  steam  stamps  at  Mill  182 1909,  1912 

slime  tables    697 

sluices 723 

Spitzkasten  at  Mill  173 1878,  1879 

stamps 174,    221,    1014 

at  mills. .  1620,  1621,  1624,  1632,  1640,  1661,  1668, 
1677,  1769,  1915 

in  California      1619 

increasing  the 2012 

on  different  size  of  feed 2012 

steam  hammer    12 

steam  stamps 126,  130,  133,  1004 

on  ore  of  Mill  48,  table  of 130 

Stedman  disintegrators 286 

Stein,  Bilharz,  and  Luhrig  tables      670 

Stroud  mills,  tables  of   1320,    1321 

Sturtevant,  Dodge  type,  breakers,  table  of  ...    1205 

emery  mill  at  Mill  186 1918 

fan  at  Mill  105 1637 

mills      288 

roll  jaw  breakers 33 

rotary  breakers  at  Mill  186 1917 

Sutton,  Steele  &  Steele  dry  table    1555 

pneumatic  separators  at  Mill  151 1803 

Tamarack  classifiers     397,    398 

Traylor  centrifugal  pumps    1588 

at  Mill  114 1662 

jigs  at  Mill  169 1864 

Trego  roasting  furnace 1548 

Tremain  steam  stamp 138 

trommels 359,    377 

at  mills. .  1681,  1682,  1690,  1691,  1692,  1693,  1742, 

1743,  1749,  1750,  1751,  1752,  1771,  1772,  1773, 

1774.  1876,  1877 

trough  washers    319 

tube  mills     -1291 

at  mills 1632,  1770,  1922 

Tustin's  mill    262 

Ullrich  magnetic  separator   1 535 

vanners    648,  658,  659,  662,  1110 

and  slime  tables  compared   691 

at  mills 1687,    1778 

washing  pans 333 

wash  trommels      330,    332 

Wengler  &  Lowe's  classifier 413 

Wenstrom  magnetic  separator    801,    802 

Wetherill  magnetic  separators. .  805,  807,  808,  1522, 

1523 
-Rowand  magnetic  separators  at  Mill  141.  .     1763 

Whelpley  &  Storer  pulverizer   289 

Wild  roller  mills,  table  of   1304 

Wilfley  roasting  furnace 1 548 

at  Mill  140    1759 

slimer 1505,    1506 

table 674,  675,  1469 

at  mills..  1633,   1661,   1662,   1669,   1687,   1694, 

1695,  1715,  1729,  1744,  1745,  1776,  1777, 

1829,  1830,  1880,  1894,  1904,  1908 

Woodbury-Benedict  jigs  at  Mill  177  ....  1892,   1893 

Woodbury  jig  compared  with  that  of  Collom 

and  Evans  jigs 1448 

tables 676,    1496 

at  Mill  117 1669 

Worthington  centrifugal  pump  at  Mill  138   .  .    1745 

pump  at  Mill  175 1890 

on  the  Rand,  by  addition  of  tube  mills,  increase  of   2015 

large  increase  of _ 2013 

treated  by  Catermole  process,  or  minerals   sep- 
aration process    1560,    156! 

See  also  each  machine. 

Capacity,  effect  on  cost 1 127 

Cape  Colony,  tin  mining  in.     H.  D.  Griffiths 2035 

Capel  mine 905 

Capelton,  Canada,  mill  at     905 

Capital  Mining  and  Tunnel  Company,  mill  of 1659 

Caps  in  amalgamating  pan   247 

Captain  Harris  atmospheric  discharge 583 

John  Richards  discharge 580 

Carat    .  .    1080 


18 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Carbon  added  to  roast  at  Mill  137 1549 

atomic  weight  of     1188 

effect  of,  in  roasting  for  magnetism 1544 

Carbonate  mine,  Paddock  jig  at    822 

Carcanagues.    Cornish    buddies,   frames,  and  kieves     728 

tin  dressing  in  Cornwall    1176 

Card  concentrator 1481,  2023 

of  jig  work 632 

vanners     657 

tables  at  mills 1660,  1769,  1770,  1777,  1830 

Care  of  belts      1093 

journals 1097 

mercury 785 

mills      1114 

Carey  mill,  bibliography  for  292 

pulverizing  mill     232 

Caribou  rifle 1509 

for  black  sands.     F.  Powell   2027 

Carinthia,  mill  in      1185 

Carkeek  classifier 395 

James,  classifier      416 

hydraulic  classifier    416,  476,  477 

jig  beds    595 

slope  of  launders 874,    875 

Carlisle  stamp  mill     1180 

Carnall  wash  trommel 334 

Carn  Dochan  mill,  dry  concentration  at      838 

mine,  dry  separation  at 820 

Carpenter  shop  for  mill 1087 

Carpet  tables 703,  750,  1035,  1464,  1507 

Carr  disintegrator 236,  284 

bibliography  for 298 

table  of  details  of   285 

Carr,  M.,  Carr  disintegrator    298 

T.,  Carr  disintegrator  for  flour      298 

Carrick,  J.  T 1178 

Carrier  for  conveyor  belt,  self -oiling 1585 

Carroll,  Montana,  mill  at   984 

Carrying  conveyors     1585 

current  in  jigs   494 

power  of  water  current    477 

Cars 843 

for  concentrates     1112 

weighing  of      1160 

Carter  auto-magnetic  separator      2029 

F.  L.,  amalgam  in  the  Transvaal    789 

Carterville  Foundry  &  Machine  Works,  The.    Blake 

breaker 1201 

life  of  wearing  parts 1223 

Casapalca,  Peru,  mill  at 1180 

Case  laboratory  breaker      1223 

of  the  Denver  Fire  Clay  Company 1204 

Casings  for  elevators,  etc 1099 

Cassiles  Mine,  Australia,     milling    at     the.     F.     B. 

Stephens     2041 

Cassiterite,  hindered -settling  test  on 615,    617 

settling  velocity  of 466,  469 

specific  gravity  of   1189 

Castelnau  table 698 

Cast  gears      1096 

Cast-iron  head  center  for  Gates  gyratory  breakers  . .    1220 

mortar  blocks      148 

specific  gravity  of   1 189 

Castor  oil 1097 

Cataract  sand  pump 868 

Catermole  flotation  process 1555 

the  minerals  separation  process   1560 

Catherine  (Australia)  mill,  wear  of  shoes  and  dies 

in     ; . .     183 

Caucasus  Copper  Company,  Limited 1860 

mill     I860 

Caustic  potash,  use  of  on  amalgamating  plates  in 

California     1619 

soda  for  settling  slimes      1148 

Cave  Springs,  Georgia,  manganese  ore  from     809 

Cazin,  F.,  advantages  of  water  over  air 838 

Cazin's  jig 641 

F.  M.  F.,  Cazin's  circular  jig    640 

theory  of  settling 476 

Cazin's  circular  jig     640 

jig   ; 641,  642,  643 

Celestite,  specific  gravity  of      1189 

Cement  for  surface  of  slime  tables 689 

Gravel  Drift  Mining  Company    211 

gravel  mill      1017 

stamped    '211 

grinders 2016 

grinding    2017 

screening  of   345 

surface  for  slime  tables .     695 


Cement  surface  on  Linkenbach  slime  table   690 

Center  discharge  for  jigs     532 

Centimeter,  equivalents  of \    H87 

Central  City,  screens      172 

cone  of  amalgamating  pans      241 

Lead  Company  mill    xxy    917 

Mill  of  North  Star  Mines  Company     .'.'       '  1617 

the  Twelve  Apostles 1657 

,      mine 1719,  1735 

Centrifugal  concentrator,  Peck     828 

dust  collector     '     883 

separator 828 

force 1611 

m  drum  magnets 793  799 

dry  separation 818 

Hendy  concentrator    683 

Huntington  mill 278 

Narod  pulverizer 282 

sand  wheels    866 

trommels 347,  350,  373 

separation  by .      827 


use  made  of  in  mills 

hydro-extractor  for  oil  process   

machine  for  separating  oil  from  concentrates  in 

Elmore  vacuum  oil  process 

pumps 

at  mills..  1688,  1694,  1695,  1696,  1711,1712 


890 
832 

1558 
868 
1721, 


1756,  1757,  1856,  1880,  1881,  1890,  1899,  1904, 

for  hydraulicking  1006 

sand  and  water,  used  for  elevating  mill  pulp  870 

rolls  74 

Sturtevant 1237 

Traylor  1588 

sand  distribution 1602 

pumps 1588 

separation  839 


separator 

a  dry.     T.  Henrotte 

Clarkson-Stanfield 

theory  of  separation  on  the. 

versus  plunger  pumps      

Centripact  screens 

at  Mill  169 

Traylor     

Cerargyrite,  concentration  of      

specific  gravity  of 


Kleritz 


19 


827 
2025 
820 
2020 
868 
1360 
1865 
1352 
1016 
1189 

Cerium,  atomic  weight  of   1188 

Cerro  de  Pasco,  Chili  mill  at 295 

Prieto  mill,  Sonora,  Mexico     2042 

Cerrusite,  specific  gravity  of     1189 

Chabazite,  specific  gravity  of  1189 

Chain  and  sprocket    1096 

magnetic  separator 811 

Chainman  mill,  Ely,  Nevada   2036 

Chain  plate  conveyor,  picking  on 489 

scraper  for  removal  of  jig  tailings 588 

Chalcocite,  hindered-settling  test  on 617 

settling  velocity  of 466,    469 

specific  gravity  of   1189 

Chalcopyrite,  crushing  by  rolls 62 

free  settling  velocity 471 

separation  from  quartz      720 

sizing  test  on 99 

specific  gravity  of   1 189 

Chalk  used  in  retorts   781 

Challenge  feed  clutch 657 

feeder   853,    1578 

feeders  at  Mill  174 1883 

rock  breaker      20 

Chalmers  and  Williams  Frue  vanners 1499 

at  Mill  124 1694,   1695 

Huntington  mills  at  Mill  171 1869 

Kennedy  gyratory  breaker 1213,  1223 

power  amalgam  squeezer 1519 

rolls  at  Mill  171    1868 

vanners  at  Mill  122 1687 

Chalmers,  estimate  of  cost  of  hand   picking  on  the 

Rand 

J.  A.  and  F.  H.  Hatch,  gold  stamp  mills  in  So. 

Africa    

Chalon,  P.  F.,  crushing  machines 

stamps 

Chamber  mill      

Chambers  for  dust    

Chamois  leather  used  on  amalgamated  plates     

skin  for  dressing  plates      759 

squeezing  amalgam 781 

Champion  breaker      58 

Copper  Company.     Copper  handbook     1925 


487 

1173 
316 
227 
294 
883 
752 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Champion  rolls  mill   1900 

stamp  mill      1897 

Chance,  H.  M.,  gold  milling      1179 

spiked  rolls  for  coal    112 

Change  house    1102 

of  magnetism  by  heat 4 

porosity  by  heat    4 

Channeling  for  sampling     884 

Channels  in  amalgamating  pans    245,  246 

Channing,  T.  Parke,.  graded  crushing  at  Lake  Supe- 
rior    2018 

Charcoal  for  melting    784 

purifying  mercury 785 

Charge  for  amalgamating  pan   243 

Charleston,  Arizona,  feeding  gravity  stamps 208 

Charleston  mill   1174 

stamps 224 

Charleton,  A.  G.,  accounts  and  reports   1179 

amalgamation    789 

arrastra 290 

breakers 60 

breakers  versus  hand  breaking 60 

costs 1124,  1127 

cost  sheet  forms    xix,  1173 

dressing  of  nickel 1185 

tin  ore  at  Altenberg,  Saxony 1173 

gold  stamp  mills 1 184 

Huntington  mill      297 

labyrinth  pointed  boxes 476 

methods  of  accounts     1 182 

milling  for  gold  ores  at  Pestarena,  Italy,  and 

amalgamation  at  Francfort     1182 

revolving  tables     492 

roasting  for  friability 56 

rolls  versus  Sturtevant  mill  and  stamps Ill 

Schranz  mill 296 

stamps  in  various  parts  of  the  world 229 

Sturtevant  mill      298 

tin      xix 

mining 56 

Charleton  classifier     478 

ore  concentrator  (classifier) 428 

Chase,  H.  S.,  cost  of  milling 1135 

Cranberry  magnetic  ores     833 

magnetite  in  North  Carolina 1176 

Chase  magnetic  separator 832,    833,    835 

Chatard,  T.  M 1149 

and   Cabell  Whitehead,  settling  of  slimes  at  Re- 
public gold  mine,  Washington   1176 

on  settling  slimes      1 148 

Chateaugay  iron  ore  concentrated  by  magnets 803 

Ore  &  Iron  Co.,  breakers  at 59 

mill      1175 

ore  separated  by  magnets   798 

Chats 894,    900 

Chaumeis  and  Simonnet,  American  gold  stamp  mill- 
ing       1178 

Cheese-scoop  sampler 844 

Chemicals  for  slime  settling,  relative  values  of 1414 

use  of    1413 

in  amalgamating  pan 249 

used  on  amalgamated  plates 756 

Chester,  Massachusetts,  mill  at 1078,  1079 

Chester  Springs,  Pennsylvania,  graphite  mill  at   ....  1075 
Chicago  &  Aurora  Smelting  Co.,  speed  of  rolls  and 

angle  of  nip 95 

cost  of  mill  at     1126 

Iron  Works  rolls 76 

Chihuahua,  Mexico,  concentration  in.     W.  S.  Hutch- 

inson  2038 

Dolores  mill,  the.    J.  B.  Parish 2038 

Granadena  mill,  the.     J.  T.  Shaw 2039 

milling  practice  at.     T.  H.  Oxnam     2037 

mining  in  western.     W.  S.  Hutchinson      1923 

Chili  mill,  development  of  the.     C.  C.  Lane   2015 

triple  deck 2017 


underdriven,  an 2017 

with  two  sets  of  rollers 2017 

mills 234,  269    1115,  1305,  2017 

Akron 1280,  1307 

as  a  re-grinder 1332,  1333 

at  mills..  1767,  1775,  1833,  1859,  1865,  1873,  1886, 
1893,  1894,  1898 

bibliography  for 295 

Boss,M.  P.,  on 1323 

different  methods  of  attaching  rollers  to 2014 

Garfield     1280,    1305 

Lane  slow-speed  mill 1308 

Mantey  offset  for    1305 

push  feeder  for  1581 


Chili  mills,  table  of  sizes,  capacities,  speeds,  weights, 

etc.,  of  Akron  Chili  mills 1308 

used  in  the  clay  industry,  different  forms  of. .   2017 

versus  rolls  for  clay 2010 

wet 2017 

Chilled  cast-iron  for  toothed  rolls    1244 

Chilled-iron  balls  for  Harz  jig  bedding  at  Mill  183  .    1913 

cost  of,  for  Bryan  mills   272 

for  amalgamating  pan  dies 245 

wearing  parts  of  rolls 1243 

roll  shells 68 

shoes  and  dies     182,  183,  184 

jaw  plates  at  Mill  161,  life  of 1837 

See  Wearing  Parts. 

Chinese  stamp  mill    224 

Chip  screen  at  mills 1726,  1879 

Chisel  used  in  scraping  plates    760 

Chism,  R.  E.,  arrastra  at  San  Dimas,  Mexico 290 

Chlorination,  bibliography  for      1173 

cost  of 1020 

process  at  Mill  98 1622 

rolls  for     Ill 

tests 1167 

Chlorine,  atomic  weight  of   1188 

Choctaw  Coal   &  Railway  Co 1 180 

Choice  of  crushing  machines    313 

process    1161 

screens     174,  371 

Choke  crushing  by  breakers     48 

rolls     98 

feed  for  rolls.     Comparison    between    free    and 

choke  feed      1229 

to  rolls  at  Mill  130 1720 

Chondrodite,  specific  gravity  of 1189 

Christensen  concentrator     1484 

Chrome  iron  ore  in  Quebec,  concentration  of.     W. 

H.  Edwards 2038 

ore  in  Quebec,   concentration  of.     W.   H.   Ed- 
wards     2034 

steel  for  breaker  jaws 2010 

jaw  plates  for  Blake  breakers  at  Mill  100     .  .    1624 

roll  shells  at  Mill  158 1822 

shoes  and  dies  at  Mills     1618,  1622,  1668 

works      68 

patent  cams 194 

Chromite  concentrated  by  free  settling 475 

milling  of   1073 

mill,  in  Newfoundland    475 

Newfoundland,  sizing  tests  on   99 

specific  gravity  of   1189 

Chromium  amalgam 730 

atomic  weight  of     1 188 

specific  gravity  of   1 189 

Chrysoberyl,  specific  gravity  of    1189 

Chrysocolla,  specific  gravity  of 1 189 

Chrysolite,  specific  gravity  of 1189 

Chuck  blocks    177 

Chuquicamata,  Chile,  separation  by  screening  at ....     830 

Church,  J.  A.,  amalgamating  pans 291 

pans  at  Tombstone 290 

amalgamation  of  gold      788 

mill  at  Tombstone      1175 

Paddock's  pneumatic  jig     837 

stamp  and  concentration    mill    at    Tombstone, 

Arizona      1180 

Chutes  for  hand  picking   489 

ore  bins 843 

in  the  mills 874 

Cinnabar  in  California,  concentration  of   2044 

ore  dressing  plant     1919 

speci&c  gravity  of   1189 

Circular  jigs    518 

movable  sieve  power  jig      503 

slime  tables,  operation  of 692 

Circulating  cyanide  solution,  advantages  of 1 647 

Cirkel,  F.,  asbestos  milling  in  Canada   2034,  2048 

magnetic  separation  at  Port  Henry,  N.  Y.      ...   2034 

milling  of  asbestos    1568 

mica 2025 

City  &  Suburban  mill,  details  of  stamps 221 

Clack  on  jigs  at  Mill  128 1714 

Clamps  for  belts 1093 

Clam  shell  dredge    1009 

Clarifying  reservoirs     460 

tanks     1409 

at  mills 1642,  1743,  1744 

Van  Ryn  gold  mines  estates     1410 

Binkley  settling  system    1409 

depth  of  discharge    1409 

Merrill  cylindrical  clarifying  tanks    1406 


20 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Clarifying  tanks,  Scpbey  system  as  used  in  Arizona  .  1411 

Tays'  clarifying  tank  with  skimming  launder  1410 

Clark,  A.  J.,  plate  amalgam   788 

silver  plating  copper  plates  at  the  Homestake 

mill      789 

Clark,  D.  K.,  manual xix 

for  Mech.  Eng 1173 

strength  of  stone     315 

Clark,  D.,  Potter  and  Delprat  processes  vs.  magnetic 

separation 1568 

Clark,  Ellis,  Jr.,  Blake  breaker  at  Przibram 57 

dressing  works  at  Przibram    1174 

gravity  stamps 224 

hand  picking  and  picking  tables  at  the  Anna 

and  Adalbert  works,  Przibram 492 

Harz  jigs  at  Przibram    640 

magnetic  separator  at  Przibram 833 

on  length  and  number  of  strokes  in  jigs 594 

on  power  in  jigs  Przibram 603 

pointed  boxes  and  Rittinger  spitzlutte  at  Przi- 
bram    476 

Rittinger  and  Salzburg  tables  at  Przibram . .  .  728 

roasting  for  magnetism 815 

stroke  of  jigs 594 

trommels  at  Przibram,  Bohemia   385 

table   689 

tube  mill 2014,  2016 

Clarkson  sampler    884 

Thomas,  Clarkson  sampler 884 

Clarkson-Stanfield  centrifugal  separator 820,    828 

dry  separator .890,    891 

Classification  by  free  settling 475 

of  breakers 13 

classifiers      1370 

conveyors    1582 

crushing  machines      316 

driers    1595 

feed  for  slime  tables 720 

finely  crushed  ores.     J.  M.  Callow     1420 

fine  sand  and  slime  concentrators   1464 

grinders 1279 

jigs 551 

magnetic  separators   796,  1521 

preliminary  breakers      1200 

washers 1341 

pulp  thickeners 1401 

pulverizers      231 

revolving  screens 1353 

riddles 1346 

rolls     62 

screens 1345 

slime  table  feed 693 

stamps 113,  1246 

tube  mills     1285 

vanners     645,  1498 

Wilfley  table  group    1465 

Classified  feed  for  Wilfley  table     1473 

products,  proper  treatment  of 1478 

used  for  film  sizing  tests    707 

versus  sized  feeds  for  the  Wilfley  table    1478 

Classifier  jigs     1447 

at  mills 1447,  1452 

new  laboratory.    H.  S.  Munroe 2020 

spigots 388 

diameter  of 404 

Classifiers    387,  1367 

adjustment  of 430 

Altenberg   416,    475 

Anaconda 395,  1367 

hydraulic,  details  of  in  mills 396 

article  on 2020 

ascending-current  cones  or  cylinders 1402 

at  Ammeberg    1121 

Engis  using  air 817 

mills  1878,  1879,  1880,  1902,  1903 

Vaucron  mill  416 

before  vanners 658 

Berenger  and  Stingls  slime  tank    1407 

bibliography  for 475 

Bilharz 475 

spitzlutte 423 

Boss  cone     425 

box 432 

Browne  hydrometric  conical 409 

Biittgenbach's  separator 447 

calculation  of 401 

Callow  cone     1402 

slime  and  water  cones   1367 

Calumet    391 

or  Richards-Coggin 1367 


Classifiers,  Charleton  ore  concentrator 428 

classification  of    1370 

Colorado  Iron  Works  Company  slime  tanks     .  .  1407 

computation  of    429 

Richards'  pocket  vortex  classifier     1374 

cone     410 

constant  head  of  water  for 387 

Dalton 398 

deep  double  trough 416 

deep-pocket  classifier    1371 

free-settling  classifiers 1371 

hydraulic 409 

definition 387 

of  sorting  column   387 

De  Kalb's  perforated  board  classifier 1402 

design  of     1432 

Dimmick 1417,  1420 

distributing  tanks   449 

Dodge  sizing  box    416 

Dorr.     J.  V.  N.  Dorr    1344 

mechanical     1343 

double  cone   426 

Dow 475,  476,  477 

Engis     475,    477 

Evans      393,  1367 

extent  of  classification 1433 

feed  for 389 

sole  for   434 

Ferraris    400 

for  coal     476,    479 

jig  tailings    587 

steam  stamp 1003 

testing 1144 

Fraser  &  Chalmers 416 

gates  and  dams 406 

G.  G.  Gates  segregator 418 


gooseneck  spigot. 
heberwasche.  .  . 


421 

helical  current  in 401 

hog-trough   1367 

hopper  bottom     412,    413,    414,    415,  416 

hopper-shaped  shallow  pocket 400 

Huet  &  Geylers   478 

Hundt's 478 

hydraulic 387 

Burgan,  A.  L 1371 

deep-pocket  hindered-settling   1387 

difficulties  attending  classification 1368 

direct  pulsator  classifier 1391 

double-cone  hydraulic  classifier    1381 

Evans  1369 

Ferraris    1369 

Fraser  and  Chalmers 416 

Gates  classifier    1369 

hindered-settling,  improved  Wolf-Tongue 1387 

history  of 1367 

Krupp  Spitzlutten    1382 

limitations  of 1368 

Longdale,  at  Mill  155 1369 

means  for  overcoming  adverse  tendencies    . . .  1369 

Merrill  small  cone  classifiers 1371 

New  Standard 1369,  1373 

principle  of  action  of  387 

Richards'  annular  vortex  classifier 1382 

pocket  vortex  classifier 1373 

pulsator  classifier      1388 

shallow-pocket  hindered-settling  classifier  . .  1384 

undercurrent    1386 

vortex,  at  Mill  124 1692,  1693,  1694 

single-spigot  vortex  classifier    1377 

sizes  of  feed  to 389 

sorting  column  in 387 

spigots  in 388 

Swain  classifier 1371 

table  of  sizes,   capacities,   etc.,   of   Richards' 

pulsator  classifier 1390 

tank  vortex  classifier 1379 

trough  or  shallow-pocket 389 

tubular  free-settling  classifiers 1381 

Wengler  classifier 1367 

Wolf-Tongue  classifier 1369 

imperfections  of  deep-pocket  form 409 

inclined  one-current  1146 

in  stamp  mills 658 

investigation  of  currents 434 

James  Carkeek  416 

kinds  of 387 

labyrinths  and  runs    447 

Lake  Superior  hog-trough 390 

products  of  in  Mill  45 391 


21 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Classifiers,  Lake  Superior,  hog  trough,  products  of  in 

Mill  46 391 

launders  for 440 

Linkenbach  pointed  boxes    412,  416 

V-box    421 

Lockhart's  automatic  gem  separator 430 

tubular    476 

Meinecke     430 

spitzlutte 425 

Merrill  cylindrical  clarifying  tank    1406 

hydraulic  classifiers 1367 

large  cones 1406 

at  Mill  106    1640 

small  cone  at  Mill  106 1641 

New  Standard 1419 

perforated  board  in 437 

pointed  box,  in  the  mills 442 

position  of    1108 

principles  of  action 387,  1368 

products,  sizing  tests  on 1141,  1144 

purpose  and  essentials  of 389 

purposes  of 1367 

quality  of  work  of 461 

Ramsey  sludge  tank 446 

results  of 405 

Richards'  annular  vortex 40b 

-Coggin  or  Calumet   391 

pulsator 1419 

shallow-pocket 401 

tubular 428 

Rittinger  pointed  boxes 411 

Robinson  coal  washer    478 

Schone  tubular    476 

screen  for 433,  443 

settling  tanks 450 

Sherman  system  of  settling  tanks 1404 

sizing  tests  on 406 

slope  of  sides 440 

spigots  for    433 

spitzlutte 421 

strainer  for 388 

suited  for  testing 1989 

surface-current  box 433,  1401 

in  the  mills 441 

Swain   1420 

Tamarack 397 

testing  of 1 170 

Thirion 475 

trough  or  shallow-pocket 389 

tubular 421 

classifier,  spitzlutte 1371 

for  hindered-settling  tests    611 

investigating  free  settling 469 

unwatering  boxes    450 

used  for  mercury  trap 774 

use  of  hydraulic  water 433 

U-shaped  iron  pipe 424 

V-box  design 419 

in  the  mills 442 

versus  screens 368 

vortex •• 403 

water.     See  Water. 

Wengler  &  Lowe's 413 

whole-current  box 443,    1402 

Wunderlich  coal  washer    477 

Yeatman 399 

Classifying  by  free  settling  in  water,  bibliography  for 

laws  of    475 

laws  of    464 

Claudet,  A.  C 1182 

gold  stamp  mills  at  Mesquital,  Mexico 1182 

Clausthal,  Germany,  breaker  at 57 

central  ore  dressing  plant  at 2039 

classifiers  at 476,    477 

concentrating  plant 1795 

details  of  stamps  at    223 

finest  size  jigged  at     606 

hand  picking  at    492 

improvements  at 1924 

jig  discharge  at 582 

feeder  at     549 

mechanism  at 530 

spigot  at 528 

jigs  at   640,    643 

•versus  tables  at   606 

life  of  screens  at    354 

mill  at  .  .965,  1086,  1102,  1116,  1121,  1174,  1177,  1186 

sieve  scale  at   367 

picking  at 487 

plunger  rods  of  jigs  at 531 


Clausthal,  power  at  1089 

pointed  boxes  used  at    476,  477 

removal  of  slimes  by  classifiers  at 373 

rolls  at 109 

screening  at   373 

sieve  scale  at   367 

sizes  of  ore  hand  picked  at 487 

slope  of  jig  sieves  at 548 

stamps  at   225,    230 

stroke  of  jigs  at 594 

trommels  at   385 

truing  rolls  at 110 

unwatering  sieve  at 586 

Clay  and  kaolin  washing,  capacity  of  Stedman  disin- 
tegrator for 286 

crucibles  for  melting 784 

crushed  in  rolls 112 

crushing  machine  for 2017 

description  of  a  breaker  used  for 2010 

effect  on  mercury 751 

elimination  of   895,  897 

ground  by  edge  runner  mills 270 

moved  by  water 878 

preparation  of.     G.  Benfey     2026 

quartz,  weight  of 1190 

removal  of  impurities  from.     F.  Lehman 2026 

settling  of 1149 

rate  of 474 

used  in  retorts 781 

washing 333,  1075,  1173,  1178,  1183,  1185,  1186 

C.  F.  Binns   2025 

Dummler 2030 

H.  Ries 2028 

J.  W.  Schamberger 2030 

in  Ohio.    A.  M.  Fish    2026 

weight  of 1190 

Clayey  ores  on  vanners 660 

Clayton,  J.  E.,  on  amalgamated  plates 743 

Cleaned-ore  plane 1465 

Cleaner  jigs  at  Mill  148 1793 

Cleaning  amalgam    780 

amalgamating  plates 756,  757 

at  Mill  100    1624 

Mill  101   1626 

in  California 1619 

jig   894 

concentrates     587 

screens  at  Mill  148 1792 

sieve 576 

machines  for  concentrates 320 

method  for  rolls 2011 

of  copper  plate  before  amalgamating    752 

plane,  definition  of 1465 

on  vanners 646 

up  dredge  products 101J 

mercury  traps 774 

sands  from  roller  mills.     H.  S.  Kenney 2017 

Clean-up  apparatus 1020 

barrel       234,  264 

at  Mill  111 1656 

bibliography  for 294 

for  testing 1156 

details  of,  in  mills 265 

devices 1519 

of  gravity  stamps    201 

mercury  traps 774 

riffles 725 

stamps  in  mechanical  batea   683 

steam  stamps 134 

pans        232,  250 

and  barrels    202 

bibliography  for 291 

tables  of  details  of  in  mills 252 

room   266 

trolley  for  a  gold  mill 2031 

See  Individual  Gold  Mills  in  Chapter  XX. 

Clearance  in  steam  stamp  cylinder 123 

of  gravity  stamps    195 

jig  plunger 529,    530 

Cleats,  cast  rubber  riffle  cleats  for  Bartlett  Simplex 

concentrators •_ 1487 

copper  riffle  cleats  for  concentrating  tables   ....  1481 

for  Deister  concentrators 1488 

Overstrom  tables I486 

height  of  riffle  cleats  for  Wilfley  table 1468 

riffle  for  Wilfley  tables 1467 

"tacking  on"  versus  "grooving" 1498 

Cleavage,  effect  of  in  minerals     . . : 3 

Clemens  Jones »J» 

Clerc,  G.,  history  of  stamps ^0 


22 


Pages  1199-1610,  Vol.  III. 

Clerc,  G.,  methods  of  jigging 

separation 

Cleveland-Knowles  magnetic  separator 

at  Mill  148 1792, 

Clifford,  H.  E 

Clinochlore,  specific  gravity  of     

Clinometer 

Clinton  fossil  ores  treated  on  Wetherill  magnetic  sep- 
arator    

Clitters  mines,  treatment  at  the 1924, 

Clogging  of  screens 

Close  sizing  for  jigging    

Cloth  for  dust  prevention 

screens 

compared  with  punched  plate 

details  of  from  the  mills    

Clunes,  amalgamation  at    

double  discharge  at 

mercury  wells  at 

shoes  and  dies  at 

stamps  at   

Victoria,  mills  at 

Clutches  for  gravity  stamps    •. 

friction   1096, 

Coagulation  of  fine  slimes 

Coahiula  coal  washer 

Coal.     See  also  Fuel. 

as  fuel  in  Wilfley  roasting  furnace 

breaker,  a  new.     W.  S.  Ayres      

at  Alden,  Pennsylvania.     M.  S.  Hochita 

Bankhead,  Alberta.     L.  Stockett  and  B.  R. 

Warden 

Stockett,  Montana.     L.  Stockett 

briquetting  system      

burned  in  mills.     See  Individual  Mills  in  Chap- 
ter XX. 

roasting  for  magnetism    

capacity  for,  of  Stedman  disintegrator 

centrifugal  machine  for   

classifier     

combined  disintegrator  and  screen  for.     M.  A. 

Sattiaux 

consumed  in  roasting  for  magnetism 

consumption  in  driers   880 

crushing  of 

dressing,  changes  in  anthracite 

jigs.     R.  A.  Henry 

dust,  air  blast  for 

removal  of    

removed  by  air  blast 

from 

handling  machinery  for 

C.  Piez 

in  Pennsylvania,  breaking  of  anthracite 

jigs  .  .520,  523,  548,  549,  574,  588,  639,  640,  641 

magnetic  treatment  of.     E.  Post    

method  of  separating  dust  from 

mine  to  develop  electric  power    

mining  in  India,  cheap.     H.  M.  Cadell 

picking  in  Cainsdprf 

preparation  machinery.     R.  V.  Morris 

Ramsey  sludge  tank  for 

required  per  horse-power  hour  at  Mill  172  .... 

screening 

and  washing  of.     T.  H.  Aldrich 

by  the  by-pass  system 

of    

S.  A.  Everett 

papers  on 

plant  of  the  Clifton  colliery,  a  new 

3000  tons  capacity    

screens  for     

separation  of  dust  from.     A.  Wiedl 

slate  pickers  for 489,  492, 

-testing  device.     Delameter 

used  in  roasting  for  magnetism      

washeries,  anthracite.     G.  W.  Harris 2049, 

different    

Pennsylvania,  bituminous.     W.  G.  Wilkins. . . 
washer y  at  St.  Beram.    M.  Benotte  . , 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


washing 1106, 

advances  made  in 

an  article  on.     S.  Diescher,  Sr 

and  screening.     T.  H.  Aldridge    .... 

at  Saint  Eloy  colliery 

the  Baam  colliery     

Cadeby  colliery 

Reynolds  culm  bank.    A.  D.  W.  Smith. . 

bibliography.     S.  S.  Wyer 

bituminous.    G.  R.  Delamater    


641        Coal  vvashing,  discussion  of.    H.  L.  Siordet 2051 

1177                improvements  in  2050 

in  a  Belgium  colliery   2050 

1793  Alabama.     E.  Ramsay,  C.  E.  Bowron  2050 

via  W.  B.  Phillips 2049,  2050 

1189                            W.  R.  Crane   2051 

1159                        America.     G.W.Harris 2050 

Belgium.     E.  Discry    2052 

808                        Colorado,  anthracite.     R.  M.  Hosea 2050 

2041                            bituminous     2051 

373                       England.    M.  Baldauf '  2052 

606                       France 2050 

1099                            results  of 2050 

170                       Indiana.     G.  H.  Ashley ,          . .  2051 

New  South  Wales      2050,  2052 

170                    machines,  control  of.     P.  Charvet     2052 

788  plant,  at  the  St.  Louis  Exposition.    J. D.  Wick  2052 

description  of  a.    D.  F.  Cameron 2051 

768  preliminary  investigation  of.   L.   A.   Harding  2051 

183                   principles  of .  2050 

226                    results  of 2050 

some  references  to 2051 

198        Coarse  concentrates  on  jigs,  defined 494 

1606                    removal  of  in  jigs 576 

concentration  without  sizing.     S.  W.  Taylor  . . .  2043 

2051                limit  of  screening    368 

mine  ore,  treatment  of 1111 

1548        Coarsest  size  treated  by  jigs 605 

2049  Coates  tubes  at  Mill  149 1795 

2051  Macquisten's  flotation  process 1563 

Cobalt  amalgam   730 

2050  atomic  weight  of     1188 

2049  concentration  at 2034 

2050  specific  gravity  of  1189 

Cobaltite,  specific  gravity  of 1189 

Cobbing     480 

815  at  Mill  186 1916 

286  devices 1439 

820  for  asbestos  1079 

479  hammers 11,  55,  56 

at  Mill  186  1917 

2018  houses  492 

814  magnets  1531 

,  882  at  Mill  138  1742,  1806,  1807,  1818 

284  Bilharz  1532 

2052  Broughton  Asbestos  Company  magnet 1532 

2051  Cranberry 1530 

839                   Eastwood 1532 

2050  Manhattan  Asbestos  Company  magnet 1531 

837                   (Wethey)  at  Mill  164 1849,  1850 

817               plant  at  Mill  158 1821 

2051  Cocheno,  settling  tank  at 459 

2052  Cochiti  mill 1092 

2051  Cochiti,  New  Mexico,  gold  mining  at,W.  C.  Wynkoop .  2036 
,  642        Cocoa  matting  for  tables 702 

2052  on  dredges   722,  1007,  1008,  1012 

2050                   tables  at  Mill  111 1655 

1092                       efficiency  of     1657 

2050  Codman  breaker 58,  61 

2051  Cceur  d'Alene  district,  Idaho,  concentration  in  the. 

2050  A.  Locke 2041 

446  cost  of  producing  lead  and  silver  in  1960,  1961,  1962, 

1874  1963,  1964 

365  hammers  used 10 

2052  mill  in 1183 

2050                   milling  at   2045 

345                   milling  practice  in  the.    J.  R.  Finlay    2037 

2050  mining.    J.  R.  Finlay   1922 

2018        Coffee  mill 255 

2051  Coggin,  F.  G.,  Ball  and  Leavitt  stamps 142 

2052  Evans  and  Linkenbach  slime  tables    . . . ! 728 

342                on  area  of  discharge  of  steam  stamps 129 

2051  efficiency  of  steam  stamps    133,  134 

493                   power  for  steam  stamps 131 

1993                   slime  tables    697 

steam  stamps 142 

2050        Cohesion  of  mercury,  effect  of  temperature 767 

2050  Cohn's  ball  mill 293 

2051  Coignet,  F.,  amalgamation 788 

2050               M.  F.,  California  stamp  battery 225 

1178        Coils  for  heating 1098 

2050  Coke  breaker,  a  new.     G.  Kroupa 2010 

2051  used  in  roasting  for  magnetism 815 

2049  Cole,  David,  power  tests  by 1927 

2050  shovel-wheel  at  Mill  124 1693 

2050        Cole's  breaker 59,  61 

2050        Collar  for  cam  shafts '. 190 

2050  grit 1098 

2049        Collectors  for  amalgamated  plates 743 

2051  Collett,  water  softening   1419 

23 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Collins,  A.  L.,  amalgam 789 

cause  of  hard  amalgam 2024 

H.  F.,  Clarkson  sampler 884 

metallurgy  of  lead  and  silver xix 

J.  H.,  definition  of  slimes 1397,   1419 

Colloids,  effect  of  heat  on 1414 

Collom,  Evans,  and  Woodbury  jigs,  capacities  com- 
pared        1448 

jig    510,  1440,  1446 

advantages  of 514 

construction  of 524,  525 

height  of  tailboard 551 

hydraulic  water  in 537 

life  of 604 

mechanism  on  grizzly 345 

modifications  of 515 

size  of  sieve  and  plunger 529 

slope  of  sieves  in    548 

speed  of  593 

sampler 847 

•versus  Harz  jig    515 

Colombia,  S.  America,  milling  in.     Juan  de  la  C. 

Posada 2039 

quartz  milling  in.     F.  F.  Sharpless 2038 

Colorado,  concentration  of  zinc  ores  in 2043 

concentrator,  cost  of  crushing  by  rolls   104 

cost  of  milling  in    1129,  1133 

producing  gold  in 1974,  1975 

lead  and  silver  in     1965 

tungsten  mining  and  milling  in    1987 

dredging  in 1009 

general  milling  practice  in  Gilpin  County   2045 

Iron  Works    1407 

Akens  and  Evans  slimer   1500 

Blake  breaker    23 

breakers  at  Mill  144 1771 

Challenge-type  feeder 1580 

continuous  grinding  pans      1323 

Dodge  breaker 31 

double-cone  hydraulic  classifier 1381 

grinding  pan,  continuous 1282 

Humphrey  rolls 1244 

impact  screen 1351 

at  Mill  151 1803 

octagonal  trommel    1360 

on  rolls 71 

Perfect  ore  feeder 1609 

power  for  rolls    97 

rolls 76,  84 

at  mills 1690,  1691,  1749 

roll  speeds    87 

roll  springs 74 

single  cone  classifier  of 477 

slime  tanks    1407 

and  classifiers 1419 

vanner 652 

jig  connecting  rod  in 530 

mill  in 1120 

milling  in   1177 

mill,  number  and  height  of  drop  of  stamps   ....     214 

practice  in  different  camps 2043 

present  milling  practice  in.     H.  C.  Parmalee   . .   2035 

Smelting  and  Mining  Company 1836 

mill xxvi,  978 

Huntington  mill  in 281 

stamps  versus  California  and  steam    134 

system  of  stamp  milling 224,  227 

versus  California  stamp  mills 213,  224,   1030 

Zinc  Company 1758 

Color  affecting  separation 889 

and  luster  of  minerals,  effect  of 3 

of  minerals  in  artificial  light 481 

Columbia  mill,  Browne  hydrometric  sizer  in    410 

vanners  in 658 

Columbian  mines,  amalgamated  plates  at   749 

pulsating  screen 343 

separator,  Jeffrey    2018 

Columbite,  specific  gravity  of 1189 

Columbium,  atomic  weight  of    1188 

Combination  cone  and  horizontal  ball  mill   2017 

crushing,  amalgamating,  and  cyanide  machine. 

M.  Dekeyser 2033 

mill,  Goldfield,  Nevada,   treatment  at  the.    F. 

L.  Bosqui 2045 

M.  R.  Lamb  2038 

Granite  County,    Montana.     R.    B.    Brins- 

made     2042 

of  the  Goldfield   Consolidated   Mines   Com- 
pany        1626 

mills 1039,  1046,  1060,  1101 

24 


Combination  of  principles  of  separation 891,  1611 

pan    239 

process  of  amalgamation 248 

silver  mills   1103 

Comet  breaker    41,  57-60,  2009 

adjustment  for  wear 43 

amount  of  throw  43 

table  of  details  of   41 

dimensions  of 44 

Commans,  R.  E.,  breakers 60 

buddies,     percussion     tables,     vanners,     slime 

tables 729 

capacity  of  jigs 597 

Clarkson-Stanfield,  Mumford   &  Moodie,   Pape- 

Henneberg  separator    838 

grizzlies,  riddles,  and  trommels    385 

hand  picking  and  picking  tables 492 

jigs 643 

Richards-Coggin  classifier,  Buttgenbach's 
pointed  boxes,  Bilharz,  Rittinger,  spitzlutte 
Osterspey  siphon  separator  used  at  Mecher- 

nich 478 

Schranz  breaker    60 

separation    1182 

separators 835 

slope  of  jig  sieves 548 

stroke  of  jigs 594 

Commercial  limit  of  concentration 1118 

Comminuting 8 

Commonwealth  mill,  Pearce,  Arizona,  milling  at  the  2044 

Mining  and  Milling  Co.,  ball  mill 261 

Compania  de  Huanchaca  de  Bolivia,  stamp  frames     160 

Minera  del  Tiro  General 1802 

Comparative  sizing  test  of  tailings  and  concentrates 

from  stamps  and  Lane  Chili  mill 1309 

tests  of  spindle  and  jaw-breakers 53 

table  of 45 

wear  of  metals  for  jaw  plates  of  Blake  breakers       48 
work  of  gravity  stamps  and  Huntington  mills  .  .    1262 
Comparison  between  single-cylinder  and  compound 

steam  stamps 1254 

of  Blake  and  Dodge  type  of  breakers    33 

California  and    Colorado    systems    of    stamp 

milling 1030 

canvas  and  rubber  vanner  belts 650 

capacities  of  Woodbury,  Evans,   and   Collom 

jigs....t 1448 

concentration  and  amalgamation 1047 

convex  and  concave  buddies 706 

slime  tables    692 

crushing  machines 313 

flat  and  sloping  mill  sites    1085 

Gates  and  McCully  breakers   45 

geared  and  belted  rolls 83 

Harz  and  Collom  jigs 515 

jaw  and  spindle  breakers 51 

jigs  and  tables 606 

large  and  small  breakers   49 

materials  for  jig  screens 545 

wearing  parts  for  breakers    48 

methods  of  running  jigs 571,    572 

mine  and  mill  work     1 123 

picking  tables 491 

plain  copper  and  silver  plated  plates 748 

pulverizers 231 

punched  plate  and  wire  cloth 354 

riffle  tables     679 

Rittinger  and  Wilfley  tables   679 

rolls  and  Sturtevant  mills    110 

round  hole  and  slotted  screens 169 

sampling  methods 848 

screens 175,  345,  369 

side-bump  and  end-bump  tables 682 

side-shake  and  end-shake  vanners 655 

single  and  double  discharge  for  stamps    209 

smooth  and  corrugated  vanner  belts     650 

spindle  breakers    46 

steam  and  gravity  stamps 134 

trommels 362,  377,  378,  379 

and  riddles 365 

Utah  Copper  and  Boston  Consolidated  mills  .  2012 

vanners  with  convex  slime  tables    691 

water  used  by  Evans  and  Hancock  jigs     ....    1442 

wire  and  plate  screens 171 

Compensating  weights  for  gravity  stamp  at  mills..  1645, 

1651,  1668 

Complex  jigging  mills  at  Lake  Superior 990 

in  Colorado  and  Utah   925 

Idaho  and  Europe    936 

Montana    ,      .     973 


Pages  1199-1610,  Vol.  III.  INDEX. 


Pages  1611-2052,  Vol.  IV. 


Complex  jigging  mills  in  southeastern  Missouri 916 

for  blende  or  pyrite   906 

Compound  and  single  cylinder  steam  stamps,  com- 
parison between 1254 

breaker 57 

edgestone  mill 235 

bibliography  for 296 

engines   1091 

steam  stamp  at  Mill  181 1906 

Compressed  air  for  pumps  1106 

jig   ...      519 

Compressive  strength  of  stone 300 

Computation  of  Callow  cone   1404 

classifier 401,  429 

grain  sizes  for  free-settling  tests 465 

Richards'  annular  vortex  classifier,  for  coarse 

grains  1382 

fine  grains 1383 

pocket  vortex  classifiers 1374 

single-spigot  vortex  classifier 1377 

tank  vortex  classifier 1380 

work  for  crushing 312 

Computed  horse-power  for  trommels 357 

Computing  tests   1161 

Comstock,  amalgamating  pans  at 291 

lode,  Nevada,  mills  on 1175,  1184 

mills,  wear  of  amalgamating  pans 249 

stamp  mills 230 

Concave  buddle 706 

slime  tables    692 

•versus  convex  slime  tables 692 

Concaves  and  short  head,  Gates  breaker  with 1208 

for  spindle  breakers   47 

Concentrate  drying  bins 1570 

at  mills 1570,  1669 

Concentrated,  list  of  ores  that  can  be 2049 

Concentrates  bins 843 

cleaned  by  trunking  machine 321 

cleaning  of 320 

coarse,  definition  of    494 

drying  of 880 

moisture  in    1 107 

of  jigs,  removal  of      586 

percentage  of,  affecting  capacity  of  jigs   601 

purity  affecting  extraction 1118 

sampling  of    845 

sizes  of,  in  mills    1116 

storing  and  shipping 1112 

tank  for  vanners 647 

Concentrating  plane  on  vanners 646 

slope  of  in  vanners     659 

Concentration.     See  also  Milling  and  Ore  Dressing. 

advances  in  the  art  of.    F.  Cirkel    2048 

amount  of 1118 

by  free  settling 475 

compared  with  smelting 1 

followed  by  lixiviation  1616,  1665 

history  of.    A.  W.  Warwick 2049 

limit  of   1118 

magnetic 790,  1521 

mill     1117 

molybdenite  dressing    1567 

of  copper  ore.     F.  H.  Probert   1997 

galena  ore.    F.  H.  Mason 2046 

pneumatic 815 

progress  in.     V.  Horel 2049 

of     ; 2049 

ratio  of.     See  Individual  Mills  in  Chapter  XX. 

relation  of  physical  properties  of  minerals  to  ...  2 

separation  by  crushing  and  screening     1566 

decrepitation  and  screening 1565 

tendencies  in   2048 

versus  amalgamation    1047 

wet.     C.Taylor    2043 

works  at  Monteppni,  Sardinia    1066 

Concentrators,  air,  using  a  continuous  blast  of  air  . .  816 

using  force  other  than  air  blast   818 

amalgam  traps  for    1516 

Bartlett  Simplex 1487 

Bartsch  rotary  percussion  table  1497 

belt  percussion  table 1496 

Card 1481 

Charleton  ore 427 

Christensen 1484 

Deister    1488 

depth  of  bed  in 644,  1510 

different  types   2022 

electrostatic  separators 1549 

Ellis    ....  .657 

Embrey 653 


Concentrators,  Ferraris  table    1490 

fine  sand  and  slime 644 

for  fine  sands  and  slimes,  belt  film-tables 697 

bumping  tables   667 

film-sizing  tables     685 

intermittent  surface  tables 700 

kieves    726 

riffles  720 

general  comments  on  rectilinear  tables '.'.  1498 

Gilpin  County 680 

Golden  Gate 681 

Hendy 683 

Hooper  pneumatic    820 

James  slimer 1491 

table    1490 

Johnston 652 

Luhrig-Buss  table  1492 

Luhrig  slimer 1495 

magnetic  separators    1521 

McLeod 1492 

New  Humboldt 1493 

New  Standard  1478 

Norbom    652 

Pinder 1479 

pneumatic  belt §18 

slimers 1594 

Triumph .  652 

Tulloch 652 

vanners     1498 

Wilfley  group 1465 

table 1465 

Woodbury  table 1494 

Concentric  conical  trommels  at  mills   1818,  1854 

cylindrical  trommels  at  mills 1655,  1793 

grinders 313 

trommels 362 

at  Mill  154 -.1815,  1816 

Concheno  mill 1665 

Concrete  bins  at  mills 1756,  1834,  1858 

foundation  for  mills 1088 

mine,  stamping  of  ore  from 220 

mortar  blocks 148 

C.  D.  Kaeding 2013 

settling  tanks  at  Mill  171     1870 

stamp  mill  foundations.     G.  P.  Scholl     2011 

Condensation  of  steam 1091 

Condenser  for  retorts 781 

Conductors  for  electrostatic  separation,  list  of  good 

and  poor    1550 

Cone  classifier 410,  426,  476 

for  amalgamating  pan   241 

mill 232,  255,  2017 

bibliography  for 292 

pulleys  for  Bradford  jig    501 

jigs 533 

sampler 846 

settlers  at  Mill  166     1855 

Cones,  pyramids  and  prisms 361 

Conglomerate  ore,  mills  for 990 

weight  of 1191 

Coniagas  mill,  Cobalt,  Ontario.    R.  Stokes 2046 

mines,  Limited 1679 

Conical  trommels    361 

at  mills..  17 14,  1783,  1784,  1785,  1815,  1854,  1898, 

1902 

tube  mill,  Hardinge 1296 

Coning  and  quartering  in  sampling 1577 

sampling  by 844 

Conkling  dry  magnetic  separator 809,  810 

jig    503 

movable  sieve  jig 640 

Connecting  rods  for  jigs    530 

Conrey  Placer  Mining  Co 2036 

Consistency  of  pulp  for  Wilfley  table  work  and  van- 
ners   1848 

vanner  feed  at  Mill  173    1878 

Wilfley  table  feed  at  Mill  173 1878 

Consolidated  Main  Reef,  sand  wheel  at 1587 

Stanley  mill,  Cammett  table  at 677 

Virginia  mill,  cross  sills  in 153 

mud  sills  in 153 

Constant  speed  for  machines      1092 

Construction  and  operation  of  stamp  mills.     R.  M. 

Aitken 2048 

expenses   1 123 

method  at  Mill  174 1887 

of  jigs   524 

mill  buildings 1088 

rolls     63 

slime  tables    .  684 


25 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Construction  of  stamp  mills.     J.  J.  Deming 

J.  Roskelly 

trommels 

on  the  Rand,  mill 

Consumption  of  cast-iron   per   ton  rock   crushed   at 

Mill  180   

coal  in  American  Process  Company's  driers    . .  . 

Argall  drier    

Edison  drier     

per  horse- power  in  gas  system  at  Mill  172 

fuel  in  Wilfley  roasting  furnace    

oil  in  Elmore  vacuum  oil  process 

pebbles  by  Abbe  tube  mills  at  Mill  101 

Krupp  tube  mills  at  Mill  118 

tube  mills  at  Mill  103     

steel  by  Bryan  mills  at  Mill  173    

rolls  at  Mill  173.... 

in  shoes  and  dies  at  Mill  117 

sulphuric  acid  by  flotation  process  at  Mill  130.  . 

trommel  screen  steel  at  Mill  173 1876, 

water  at  mills 1413,  1640,  1648,  1664,  1730 

the  Rand 

Washington  Arizona  plant 

by  Ferraris  patent  tables,  table  of 

Hancock  jig     

working  on  Montana  copper  ores 

Johnston  vanners 

suspended  frame  vanners 

Wilfley  slimer 

Continuity  of  running,  effect  on  costs    

Continuous  grinding  pan,  Colorado  Iron  Works  .... 

pans 

kieve   

movable  sieve  power  jigs 

or  Boss  system  of  working  amalgamating  pans  . 

surface  round  tables 

tables 

fixed,  circular,  convex  slime  tables    . . . 

revolving,  circular,  concave  slime  tables 

versus  intermittent  action  on  breakers    .... 

Convex  and  concave  rolls    

buddle    

Cornish  buddies  at  Mill  185 

slime  tables    

comparison  with  vanners 

versus  concave  slime  tables  .  . .' 

Conveying  and  draining  belt  at  Mill  130 

picking  belt  at  Mill  139 

belts 

at  mills..  1585,  1631,  1667,  1670,  1681,  1706, 

1709,  1771,  1772,  1805,  1806,  1807,  1808, 

1810,  1811,  1812,  1813,  1819,  1831,  1859, 

1861,  1862,  1863,  1882, 

New  Kleinfontein  Company  plant 

on  magnetic  separators 

Conveyor.  Aultman  coal 

belts,  layer  of  coarse  ore  to  protect  belt  at  Mill 
158. 


cold  ore  to  protect  belt 
Leviathan  . . 


method  of  cleaning 

of  Wetherill  magnetic  separator,  proper  speeds 

portable  at  Mill'  167' .' .' .' .' .' .' .' .' ." .' .' .' .' .' .' .' .' .' '. '. '. '. 

self-oiling  carrier  for 

tripper  at  Mill  124 

for  discharging      

use  of  with  Blaisdell  excavator  at  Mill  117. .. 

notes  on  a  75-foot 

Conveyors 859, 

See  Individual  Mills  in  Chapter  XX. 

at  Mill  135 

bibliography  for 

bucket 

Caldwell  helicoid  conveyor   

carrying  conveyors 

classification  of      

different  types  of.     W.  R.  Ingalls 

disc,  at  Mill  124 

drag  or  disc 


Edison  distributing 
endless  belt 


for  jig  tailings 
handlirj 


ing  concentrates  at  Mill  173 

hoe 

Kreiss  jerking    

pan  or  plate 

picking  on    

push 


2049 

2048 

350 

2049 

1902 

1599 

1600 

1600 

1874 

1548 

1560 

1626 

1677 

1632 

1879 

1877 

1668 

1722 

1877 

1731 

1410 

1411 

1490 

1441 

1442 

1502 

1503 

1506 

1127 

1282 

1282 

727 

499 

248 

1506 

686 

689 

692 

55 

111 

704 

1916 

686 

691 

692 

1720 

1749 

1585 

1708, 

1809, 

1860, 

1883 

1586 

804 

2031 

1826 
1807 
1585 
2031 

1523 
1857 
1585 
1691 
1586 
1670 
2031 
1582 

1735 

884 
860 
1582 
1585 
1582 
1609 
1695 
1583 
1582 
861 
861 
588 
1881 
1582 
884 


Conveyors,  Robins  belt  1610 

rubber  belt 859 

scraping  860 

screw 861,  1582 

Cook,  R.  A.,  magnetic  plant  at  Dannemora,  Sweden.  1175 
Wenstrom  separator  at  Dannemora  mine,  Sweden  833 


Cooley,  G.  T.,  dressing  zinc  ore  in  Missouri  .  .  . 

Jig    .........; 

number  of  sieves 

shafts  for    

tank 

width  of  sieve    

jigs  for  blende     

Cooling  ore  from  galena  roaster 

Cooper-Hewitt  lamp 


1180 
643 
590 
532 
522 
591 
643 
1548 
1931 

Cooper,  J.  R.,  on  amalgamated  plates 749 

Copake  Iron  Works,  wash  trommel  at 330 

Coppee  coal  washer   2018 

Copper,  action  of  gravity  stamps  on 314 

amalgam 730 

amalgamated  plates 747 

amalgamating  plates,  difficulties  in  use  of 1515 

and  silver-plated  plates   764 

atomic  weight  of     1188 

boxes  for  jig  products    586 

breaking  in  Mine  44 54 

clean-up  of  in  stamp  mills 134 

comparison  of  breaking  by  hand  and  by  machine      13 

concentrated  by  free  settling 475 

cost  of  producing    1948 

crushed  by  Calumet  &  Hecla  Company  in  Mill 

44 259 

for  jig  screens    545 

riffle  cleats  on  concentrating  tables 1481,'  1486 

screens 354 

handbook,  Lake  Superior  copper  mines 1925 

hindered-settling  tests  on 611,  617 

in  tailings  of  Mill  48 130 

Lake  Superior,  adaptability  of  Steam  stamps  for 

crushing 314 

mills 114,475 

masses  cleaned  by  steam  hammer 12 

native,  specific  gravity  of 1189 

ore,  hand  picked 482 

leaching 1167 

method  for  treating  low  grade.     N.  S.  Keith  2039 

mill  for.  .893,  904,  905,  915,  958,  961,  965,  973,  984, 

990,  1005,  1022 

separated  by  oil 831 


screening 
size 


used  for 


830 
340 


1584 


of  grizzly 

stamps  suited  for 134 

treated  at  Moonta  mines,  Australia 505 

by  Collom  jigs    515 

in  Mills  44,  46,  47,  48 486 

percentage  of  in  tailings  of  Mill  46 131 

picking  of 894 

plate,  annealing  of 747 

preparation  of   747 

screens 174 

plates 179 

absorption  of  amalgam  by 765 

preparation  of   752 

stains  on 751 

precipitated  by  scrap  iron 1082 

pure,  specific  gravity  of     1189 

Range  Consolidated  Company,  Champion  stamp 

mill .. 1897,1900 

Mfg.  Co.,  rock  houses,  Michigan 2045 

removal  of 251 

results  of  tubular  classifier  tests  on     613 

riffle  cleats  for  Deister  concentrators 1488 

rock,  cost  of  crushing  at  Atlantic  mill    51 

crushing  by  rolls     62 

stamped  at  Phoenix  Mine   140 

settling  velocity  of 466,  469 

silver  in 766 

ores  tested  by  Collom  jigs  in  Mill  42 515 

specific  gravity  of   3 

versus  silver-plated  plates 748 

wire  cloth  for  jig  sieves  at  mills  ....  1707,  1708,  1869 

Cordier,  E.,  Vapart  disintegrator    299 

Core  for  magnets    794 

Cores  of  rolls 65 

Corliss  engines  .  .  .  .906,  958,  973,  982,  986,  987,  1057,  1091 

Cornacchino  Mine,  Tuscany,  mill  at 1074 

Corning,  Frederick  G.,  Corning  belt  concentrator. . .  729 

table . 669 

Cornish  convex  buddies  at  Mill  185 1916 

feeder    .                   856 


26 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Cornish  frames   704 

jigs 506 

pump 994 

rolls  109,112 

at  mills : 1714,  1868 

stamp  mill  for  tin  ores     2012 

stamps 230 

tin  concentration  works,  roasting  for  porosity  at     829 

dressing.     E.  Walker 2038 

mills      1119 

ore,  crushed  by  Husband  stamps 141 

practice 1915 

works 704 

vanning  shovel ;  .  •  •    1152 

Cornwall,  England,  Acme  table  for  treating  tin  slimes  1506 

cost  of  crushing  by  rolls  in  _ 104 

Elmore  vacuum  oil  process  in    1559 

jigging  in      609 

kaolin  washing  in 1077 

kieves  in 727 

labyrinths  in 448 

milling  in 1173 

mills  in 1176,  1180,  1185 

rolls  in Ill 

runs  in,  on  tin  ore    478 

stamps  in   228 

system  of  tin  dressing.     C.  M.  Myrick 2044 

tin  dressing  in 1081 

E.  Skewes     2037 

E.  Walker 2038 

use  of  rag  frames  in 1507 

Corrosion  of  jig  screens 545,  547 

screens      354 

Corrugated  belts  for  vanners    647,  650 

Frue  vanners  at  mills 1703,  1868,  1870 

Johnston  vanners  at  Mill  167 1858,  1859 

•versus  smooth  belts  for  vanners     650 

iron  for  mill  buildings   1088 

rolls  . .  106,  110,  111,  2010 

at  Mill  152     1806 

description  of  Allis-Chalmers  type 1242 

table  of     107 

sizes,  capacities,  and  power 1243 

stamp  screens 226 

Corundum,  broken  by  heating  and  quenching 9 

dressing  1176,  1181,  1183,  2029,  2030 

Hill,  North  Carolina 57 

mill  at 1078,  1079,  1176,  1184 

milling.    H.  E.  T.  Haultain    2025 

in  Canada.    D.  G.  Kerr 2025 

ore,  mill  for 1078,  1184 

specific  gravity  of  1189 

washing 333 

pan  for   335 

Cost  accounts 1 122 

and  extraction 1939 

bibliography  for 1173 

details  of  for  breaking 50 

of  blanket  tables 703 

blowing  dust  from  coal    817 

board  at  mills    1100 

breaking 51,  57 

ore 1222,  1223 

in  Gates  breakers 1222 

buckets  for  conveyor    861 

calcining  at  Mill  137      1549 

changing  heads  and  concaves,  Comet  breaker .       47 

chemicals  for  pan  amalgamation 250 

coal   1092 

cobbing  at  Mill  186   1917 

concentrating  lead  zinc  ores.    A.  Bordeaux  .  .    2049 

concentration     2 

at  Butte.     C.  W.  Goodale 2048 

copper  refining  at  Mill  173 1881 

crushing    60,  1222 

at  mills 1222,1883 

by  breakers    49 

Huntington  mills 281,  1318 

jaw  breakers,  table  of  60 

Minnesota  Iron  Co 51 

rolls 104 

spindle  breakers,  table  of    50 

stamps 205 

for  interest,  taxes,  insurance  and  depre- 
ciation       205 

steam  stamps 134 

road  material 51 

cyaniding    1028 

at  Mill  106      1642 

decantation  slimes  plant,  Mill  108 1647 


Cost  of  direct  smelting     1 

dredge  and  equipment     1654 

dredges 1013 

dredging 1654 

drying 1598,    1599 

duck  for  canvas  tables  at  Mill  103    1633 

dust  chamber  and  fans    817 

electroplating     755 

erecting  a  complete  decantation  slime  plant  in 

South  Africa      1940 

large  Montana  copper-sulphide  mill   ....    1939 
roasting  and  magnetic  separation  plant    .    1940 

20-stamp  mill.     F.  C.  Roberts 2049 

zinc-lead  concentrator    1940 

mills  ....  1124,  1618,  1731,  1770,  1875,  1939,  1940 

filter  pressing  plant,  Mill  108 1647 

fine  grinding.      W.  A.  Caldecott     2015 

freight     1126 

fuel  for  rotary  drier  at  Mill  186 1917 

gold  dredging    1009,  1013 

milling  in  Venezuela 1127 

grinding  at  Mill  130    1724 

by  arrastra 238 

tube  mills  1291 

hand  jigging 1129 

jigs 499 

picking 487,  489,  492,  1438 

galena 488 

handling  material  by  conveyor  belts 1585 

ores  by  Blaisdell  system 1603 

Heberli  mill  wear   .' 258 

jaw  and  spindle  breakers 52 

plates  on  Blake  breaker 48 

jigging  in  Missouri     609 

jigs 604 

jig  screens 547 

labor  and  supplies      .- 1941 

at  Mill  174    1887 

for  breakers 51 

Huntington  mill 281 

pan  amalgamation 250 

stamps 206 

in  mills 1100 

power,  supplies,  board,   etc.     See  Individ- 
ual kills  in  Chapter  XX. 

lumber 1126 

machines 1 125 

magnetic  separation  810 

of  iron  ore      .* 802 

McDougall  roasting  furnaces   1546 

mercury  for  stamps 206 

milling  at  mills    1619,   1639,   1640,  1643,  1645, 

1731,  1793,  1905,  1906,  1916,  1919 

in  Colorado     1129 

Missouri 1129 

Nova  Scotia.     W.  L.  Libbey   2049 

South  Africa 2049 

J.  H.  Pitchford 2048 

various  mills 1 126 

on  the  Rand.     J.  R.  Williams     : .   2049 

mining 1126,  1940,  2048 

and  treatment  at  Cripple  Creek,  Colorado. .    1616 

effect  of  attitude  of  orebody  on 1942 

economy  and  speed  on 1948 

external  factors  on    1941 

internal  factors  on 1942 

size  of  orebody  on      1942 

stamping,  dressing,  etc.,  at  Mill  180 1905 

mortar  lining 166 

oil  for  separation 831 

operating      1940 

all-sliming  filter- press  system 1648 

Argall  four-tube  drier 1600 

at  Mill  186 1919 

flotation  processes 1562 

Minerals    Separation     Company,     flotation 

process    1561 

Finder  concentrators      1481 

Trego  roasting  furnace      1548 

with  Cleveland -Knowles  magnetic  separators  1542 

pan  amalgamation    250 

plant  for  electroplating 755 

power  at  Mill  105     1639 

by  gasoline  engines     1091 

for  stamps    205 

producing  copper  at  mills 1894,  1956,  1957 

general  considerations    with    regard    to..  1958, 
1959,  1960 

in  Arizona  districts 1953,  1954,  1955 

Bisbee  or  Warren  district 1954,  1955 


27 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Cost  of  producing  copper  in   Clifton-Morenci    dis- 
trict....  1953,   1954 

Globe  district 1953 

Lake  Superior  district 1948,  1949,  1950 

Montana  district 1950,  1951,  1952,  1953 

Mount  Lyell,  Tasmania 1957,  1958 

Utah  district 1955,  1956 

various  districts 1958 

diamonds  at  Mill  188 1922 

gold     1974 

at  Douglas  Island,  Alaska  . .  .  1975,  1976,  1977 

in  Black  Hills  district,  South  Dakota  1977,  1978 

Cripple  Creek  district,  Colorado. .  1974,  1975 

El  Oro  district,  Mexico 1980,  1981 

Grass  Valley  district,  California 1977 

Kolar  district,  India 1981,  1982,  1983 

San  Juan  district,  Colorado .  1978,  1979,  1980 
Witwatersrand,  South  Africa  ....  1983,  1984, 
1985,  1986 
iron   ore  concentrates    in    eastern    United 

States  1986,  1987 

lead  and  silver  in  Broken  Hill  district    1964,  1965 

Cceur  d'Alene  district 1960,  1961,  1962, 

1963,  1964 

Colorado  district     1965 

Utah  district 1966,  1967,  1968 

lead  and  zinc 1968 

in  Missouri  district 1968,  1969,  1970,  1971, 

1972,  1973,  1974 
lead,  general  considerations  regarding      . . .    1974 

in  Flat  River  district 1971 

tungsten  ore  concentrates  in  Boulder  County, 

Colorado 1987 

zinc  in  Joplin  district    1972 

pumping  at  Mill  180       1906 

with  Latta  &  Martin  pump 1590 

quarrying  51 

refining  at  Mill  106    1643 

repairs  on  rolls    104 

vanners 663 

Wetherill  magnetic  separators 1525 

retreatment  at  Mill  130 1724 

rock  emery  millstones 254 

roll  shells 66,  68,  69 

running  breakers  54 

log  washer   324 

screening 360 

screens 169,  170,  174 

for  Bryan  mills   273 

jigs 547 

shoes  and  dies 182,  183,  184 

slime  table   691 

smelting  versus  chlorination   1020 

stamping    221 

stamp  cams 192 

milling 2048 

screens 173 

stem 187 

tappets    189 

steam  power 1 134 

tramming  at  Mill  133 1731 

treatment  at  mills     1649,  1920 

trommel  screens 352,  361 

tube  mill  lining  in  New  Zealand   2016 

vanner 691 

belts 650 

water  at  Mill  179 1899 

for  stamps    206 

wearing  parts  for  stamps 206 

of  Blake  breakers 26 

Dodge  breakers 31 

Forster  breaker 28 

spindle  breakers    46,  47 

wear  of  stamps  and  Bryan  mill 274 

on  Bryan  mills 272 

Costs.     See  also  each  machine. 

at  Mill  97 1621 

effect  of  altitude  on 1941 

climate  on      1941 

homogeneity  of  ore  on 1943 

losses  on     1944 

marketing  the  products  on 1942 

population  on 1941 

temperature  on 1942 

transportation  on 1942 

underground  conditions  on 1941 

general  principles  governing 1940 

high-grade  versus  low-grade  mines    1948 

on  the  Rand  and  in  California 2048 

Cosumnes  River,  California,  mill  at   1023 


Cotton  cloth  for  filtering  dust 883 

duck  for  tables    700 

Cottonseed  oil   1097 

Coupling  of  machines    1110 

Cover  for  amalgamating  pan 244 

for  oil  holes 1098 

Cover  jigs  537,  571 

work  of  stamps,  cleaning  up 320 

Covers  for  mortars 167 

Cowenhoven  Tunnel  Co.,  rock  house     485 

Coxe  automatic  slate  picker    492 

gyrating  screen    345 

Coxe,  Eckley  B.,  corrugated  rolls  for  coal 110 

Coxe's  finger  bar  grizzly  and  gyrating  screen . . .  385 

Luhrig  coal  jig  at  Drifton,  Pa 640 

Coxe's  screen 2019 

Coxheath  ore  crushed  by  rolls,  sizing  test    99 

Cox,  William  J.,  manager  of  Mill  100 1275 

Crab  for  gravity  stamps 200 

" Crack-proof"  vanner  belt,  the 1503 

Cradle 723 

Craig  coal  washer.     W.  Scott 2051 

washing  machine.     W.  Scott 2039 

Cranberry  coal  breaker 205 1 

magnet  1530 

at  Mill  156 1531,  1818 

magnetite  ore,  cost  of  concentrating  1135 

mill  for 1180 

tests  on     1176 

mill    1817 

ore,  magnetic  separation  of 835 

separated  by  magnets 833 

Crane  at  Mill  171  for  removing  tailings    1870 

log  washer  at  Mill  95 1617 

Crank  arm  mechanism  for  jigs 535 

Crawford  mill    234 

bibliography  of 295 

Cream  separator 827 

Creede,  Colorado,  milling  at 1925 

milling  at.     A.  Lakes 2041 

United  Mines,  Humphrey  mill 1766 

Cremer,  R.,  Baum  and  Sheppard  jigs  for  coal 643 

Carr  disintegrator  for  coal 298 

coal  screening    385 

Hochstedt  apparatus      838 

Cresson,  George  V.,  breaker  of  Blake  type 23 

Co.,  rolls 72 

Crickboom  log  washer  at  Mill  147    1787 

wash  trommel 330,  334 

Cripple  Creek,  Colorado,  concentration  at 2044 

cost  of  mining  and  treatment  at 1616 

producing  gold  in 1974,  1975 

mill  at 1038 

milling  practice  at 1925 

rock  house   485 

treatment  of  ores.     G.  E.  Walcott    2042 

Crocker's  patent  stamps    229 

Crocoite,  specific  gravity  of 1189 

Crookes,  Sir  Wm.,  diamonds  1185 

the  washing  pan   2020 

Cross  compound  steam  stamps 1250 

mill,  Colorado,  gold  and  silver  in  amalgam  in     762 

hydraulic  classifier  in 774 

mercury  trap  at 774 

wells  in 769 

plates 741 

ratio  of  gold  to  silver  on  plates  in 763 

mine,  Blake  breaker  at    1621 

sills  for  gravity  stamps 153 

Crossley  pebble  mill 2014 

Croton  iron  mines,  cost  at 1 135 

mill  at   1175,  1180 

ore  concentrated  by  magnets 798,  803 

Sturtevant  mill  at , 298 

Crown  dry  concentrating  system,  description  of  ....  2026 

ore  sizer 2019 

gold  dry  concentrating  plant,  Tintic,  Utah 2044 

mill,  Georgia.    H.  V.  Maxwell 2036 

Point,  mill  at 901 

mines 1174 

Reef  Gold  Mining  Company,  use  of  milk  of  lime 

for  slime  settling  at 1416 

mill,  details  of  stamps   221 

tailings,  treatment  of 2048 

Crucible  for  melting 784 

Crusher  in  a  stamp  mill,  description  of  a  fine 2014 

stamp  mill,  fine 2016 

Magic 299 

McLanahan  and  Stone  single-roll 1241 

sectional  cushioned 20 


28 


Pages  1199-1610,  Vol.  III. 

Crusher,  Sturtevant 

Crushers  for  testing 

Crushing.     See  Breaking. 

Crushing    

and  jigging  department  at  Mill  146 

screening,  separation  by 

of  molybdenite  by 

article  on.     L.  H.  Sturtevant 

at  Black  Hills,  S.  Dakota.     C.  H.  Fulton 
Lake  Superior,  graded.     J.  P.  Charming 

the  Simmer  and  Jack  mine 

bibliography  for  laws  of 

choice  of  breaker  for    

choke  

by  breakers    

comparisons  between  wet  and  dry.     F.  Merrick 

concentrates 

cost  of 

at  Mill  162 

by  breakers    

gravity  stamps 

Huntington  mills 

jaw  breakers,  table 

rolls 

spindle  breakers,  table  of    

steam  stamps 

cylinders 

department  at  mills 1690,  1709, 

dry.     P.  Argall 

rolls  for    

extent  desired 

final 

for  cyanide,  comparison  between  wet  and  dry  . . 

free 

graded  by  rolls    

in  sampling    

laws  of    300, 

machines,  advance  in 

compared    

discussion  of  fine.    R.  Allen 

for  cement    

kinds  of 

sizing  tests  of 

means  of  computing  efficiency.     Pearce  &    Cal- 

decott    

mechanics  of.     C.  De  Kalb   

methods  of 

mill,  description  of  a  wet 

of  Lake  Superior  iron  ore.     R.  C.  Newhouse.  .  . 

middlings 

plant  at  Kalgoorlie,  dry.     H.  J.  Brooke 

mills 1748,  1828,  1831,  1871, 

ideas  on  a  modern  fine.     P.  Argall 

power  for.    E.  A.  Hersam   

preliminary 

principle  of  roll  crushing 

quality  of,  by  rolls    

relative     merits     of    wet     and     dry     crushing. 

P.  Danckwardt    

ribbons   

rolls 

rules  for  power  used 

single  stage 

tests  of  Gates  and  McCully  breakers    

tabulated  results  of.     J.  B.  Porter 

theory  of.     E.  A.  Hersam 

with  stamps,  coarse    

work  required  for 

Cryolite,  specific  gravity  of 

Crystallization  affecting  separation    

effect  on  mill  scheme 

of  stamp  stems    

Cubic  foot  of  broken  ore,  weight  of ,1160, 

measures,  equivalents  of   

Culm  banks,  methods  of  washing.     B.  T.  Berthelot 

classifiers  at  Mill  134 

Cumberland  Ely  Copper  Company 1865, 

Cummer  drier   

Cummings  mill,  bibliography  for . 

ore  granulating  mill   

mill    

Cumulative  direct  plot 

logarithmic  plot 

plot  of  sizing  tests 1139, 

Cunnack's  pulverizer   

bibliography  for 

Cuprite,  specific  gravity  of 

Currents  in  box  classifiers 

settling  tanks 

velocity  of  in  settling  tanks 


<<>> 

OF  THE 

UNIVERSITY 


INDEX. 


Pages  1611-2052,  Vol.  IV. 

Current  water  wheels 1Q90 

1137                    wheel  dredges 1013 

Curtis,  A.  H.,  ball  mills 293 

Berdan's  pan 29 1 

1783                Blake,  Gates,  Comet,  Dodge,  Marsden  breakers  59 

1566                Bryan  mill    295 

Crawford  mill * . . . "  295 

2009  crushing  machines 

2033  Cyclone  pulverizer    . .  29Q 

Cyclops  mill    1  ."'.'.  "'.'.'.!'. 

2010  Harvey's  stamp,  Hope's  compound  battery. . . . '.  227 
315                Howland  pulverizer 297 

Hunt'ngton  mill  -vs.  stamps 297 

98  Husband  pneumatic  stamps    143 

48  Krom's  rolls     ..*... 

2018  Lamberton  mill 295 

1113  Leviathan  pulverizer      .....  299 

49  Morel  and  Hall's  mill 295 

1222  Niagara  crusher .  294 

on  breakers    59 

205               pneumatic  pulverizer   299 

1318                Schranz  mill 296 

50  stamp  mills,  Krom  rolls,  Huntington  mills 1182 

104        Curve  of  cams 196 

50        Curves  of  film  sizing  tests 708 

134  jig  work    632 

65  settling  velocities 467  473 

sizing  tests    1139,  1144 

stamp  velocities 216 

1224        Cushman  and  Hubbard   Prevost,  decomposition  of 

303  feldspars 1418 

62  A.  S.,  decomposition  of  the  feldspars 1400 

2017  effect  of  water  on  rock  powders 1418 

98        Custom  milling  482 

103  mills 915,  978,  1029,  1035,  1157 

849  bins  for 842 

1325  plates  in  .     748 

2018  sampler  of  Mill  102   1629 

313        Cut  gears   1096 

2014        Cutten,  W.  H.,  gold  dredging  in  New  Zealand  .  1179,  1184 

2014  Cutter,  G.  A.,  tests  on  strength  of  granite 302 

H.  C.,  testing  plant  at  the  University  of  Minnesota   1179 

315        Cutting  down  in  sampling 849 

Cuyahoga  steam  stamp..  114,  118,  119,  121,  122,  123,  126, 
2017  127,  128,  133 

1340        Cyanide,  amount  used  on  plates     757 

effect  of  on  plates     757 

2017  for  cleaning  mercury    786 

2009  preparing  amalgamating  plates 752 

1119  machinery    1600 

2035  of  silver  used  for  electroplating .  755 

1882  plant  for  gold  mill  tailings 1017,1028,  1114 

2018  Robinson  riffle  in     721 

1340                   the  Windsor  in  the  West  Rand 478 

9               practice  in  S.  Dakota.     J.  Gross 1419 

1224               process,  rolls  for   Ill 

50               sand-treatment  at  Mill  117 1670 

slimes  plant,  Mill  106    1642 

2018                   -treatment  at  Mill  117 1671 

101               tests 1166 

62               used  on  amalgamating  plates 751,  760  1619 

309        Cyaniding  at  El  Oro,  Mexico.     C.  Butters 1942 

103                               C.  Butters,  E.  Hamilton    2040 

45                   Goldfield,  Nevada.     M.  R.  Lamb 1922 

2017  the  Homestake.     C.  W.  Merrill    1419 

2018  bibliography  for 1173 

2015  in  New  Zealand.     J.  Park 2024 

304  of  gold  and  silver  ores.     Julian  and  Smart 1323 

1189  with  and  without  concentration 2047 

890        Cyanite,  specific  gravity  of  1189 

1120  Cycle  of  gravity  stamps 216 

188        Cyclone  beater  at  Mill  186     1917,  1918 

1190  disintegrator  and  pulverizer    1319 

1187  dust  collector  at  mills 1637,  1803,  1863 

2050  pulverizer 236,  288,  297,  817 

1733  bibliography  for 298 

1866  table  of  details  of 289 

880        Cyclops  mill    234 

292  bibliography  for 294 

255        Cylinder,  Alsing    266 

232               crushing 65 

1140  steam 122 

1140        Cylindrical  driers 880,  1596 

1144  Alsing  Company,  J.  R 1597 

232  American  Process  Company 1597 

293  Argall 1599 

1189  retorts 781 

434  roasting  furnaces  at  Mill  148 1793 

451  trommels 348 

454  wash  trommel 335 

29 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


D 

Daggett,  E.,  on  lixiviation 1167 

Russell  leaching  process 1175 

Dahlonega  district  light  stamps 221 

mortar  block 148,  150 

mortars     152 

Daily  amalgam,  gold  and  silver  in 762 

Dalhousie  University,  the  ore  dressing  apparatus  at 

the.     F.  H.  Sexton 2048 

Dalton  classifier 398 

hydraulic  classifier    398 

Daly-Judge  mill    1724 

Park  City,  Utah 1923,  2038 

P.  A.  Gow,  A.  M.  Hobart,  G.  S.  Kruger,  F.  H. 

Parsons 2035 

mine  and  mill ' 2042 

Daly-West  mill.     W.  I.  Spencer 2035 

Park  City,  Utah 1923,  2038,  2042 

Mining  Company 1726 

slime  plant,  Park  City,  Utah 2042 

Dam,  Belgium,  Rittinger  tables  at    668 

Dams  for  classifiers    406 

Dana,  E.  S 2,  3 

mineralogy xix 

minerals 1173 

system  of  mineralogy 1188 

table  of  hardness 2 

Dana's  tube  mill 2017 

Daniels,  C.  H.,  on  settling  kaolin   1149 

Dannemora,  Sweden,  magnetic  concentration  at  ....  833 

separation  of  iron  ore 801 

mill  at 1175 

Darlington,  J.,  on  breakers 60 

rolls     Ill 

trommels 385 

Darrow,  W.  E.,  testing  of  gold  mill  tailings    . . .- 2049 

Dash  pot  for  steam  stamps    127 

of  Nordberg  steam  stamp 1247 

Data  from  the  mills  concerning  settling  tanks 458 

of  rolls,  table  of 64 

Datolite,  specific  gravity  of 1189 

Davey,  Paxman  and  Company 282 

Davidsen,  formula  for  calculating  amount  of  pebbles 

for  charging  tube  mill 1288 

power  required  by  tube  mills 1289 

speed  of  revolution  of  tube  mills 1337 

tube  mill 1280,  1297 

cost  of  grinding  by     1292 

Davies,  D.  C.,  Blake  breaker 56 

free-settling  velocities 476 

gra^  ity  stamps 223 

Husband  and  Sholl  pneumatic  stamps,  Patter- 
son spring  stamp 143 

hydraulic  mining    1173 

Marsden  breaker 56 

metalliferous  minerals  and  mining xix 

movable  sieve  and  Harz  jigs 639 

E.  H.,  amalgamation 787 

Blake-Marsden,  Dodge,  Gates  breakers 56 

breakers 56 

buddies,  slime  tables,  vanners,  kieves,  Hendy 

concentrator 727 

Clarkson-Stanfield  process 837 

Crickboom  wash  trommel     334 

free-settling      velocities,    hydraulic    classifier, 

pointed  boxes 476 

gravity  stamps 223 

grizzlies  and  trommels     384 

Griison  ball  mill 293 

Huntington  mill 296 

jig  bed 574 

Krom's  rolls     109 

Lion  mill 294 

machinery  for  metalliferous  mines     xix 

material  of  bottom  bed     574 

mill  schemes      1 173 

Monarch  magnetic  separator    832 

movable  sieve,  Harz,  Bilharz  jigs 639 

on  limit  of  sizes  jigged 605,    606 

roll  speeds    87 

Davis  Colby  shaft  furnace  for  roasting 814 

filter  press  at  Mill  102 1630 

Davis,  F.  M.,  Iron  Works  Co.,  Ferraris  ball  mill 1323 

patent  cams 194 

roll  speeds    87 

M.  C.,  on  Tremain  stamp 139 

rolls     Ill 

at  Mill  144    1771,  1772,  1773 

Davy  No.  3  Mill,  Joplin,  Missouri    2042 


30 


Day,  D.  T.,  concentration  of  black  sands 2047 

Dayton,  Nevada,  amalgamating  pan 241 

mill  at 1184 

Dead  plate  on  trommels      356 

sea  water,  weight  of     1 188 

Deadwood,  Terra  mill,  amalgam  in 783 

order  of  drop       215 

De  Bavay  flotation  process  .  .  .  1555,  1562,  1568,  2030  2038 

at  Broken  Hill     1562 

De  Beers  Co.,  diamond  dressing    831 

Consolidated  mines     1080 

Ltd 1923 

Mining  Company   1922 

Debris,  control  by  government  of    2045 

Deck  cover,  linoleum  for     1467 

for  Wilfley  slimer .  1504 

table    1467 

of  New  Standard  concentrator,  linoleum  for  ...  1479 

round  tables,  material  for,  at  Mill  162 1846 

Decomposition  of  feldspars,  A.  S.  Cushman  and  Pre- 

vost  Hubbard      1418 

DeCourteney,  H.  W 225 

gravity  stamps 225 

Decrepitation 1611 

and  screening 839 

at  Mill  137 1741 

heating  for 829 

of  minerals 5 

separation  by 1565 

use  made  of,  in  mills 890 

Deep  double  trough  classifiers    416 

pocket  hydraulic  classifiers    409 

free-settling  classifiers 1371 

hindered -settling  classifier 1387 

Deetken,  G.  F.,  Atwood  amalgamator,  Eureka  rubber  789 

concentration  in  California  stamp  mills 1181 

kieve   729 

stamp  battery 229 

Definition  of  free  settling  and  hindered  settling   464 

of  hindered  settling 484 

Definitions  for  jigs 494 

Deflection  of  wire  rope    1095 

Deflectors  for  spitzkasten 440 

in  settling  tanks 458 

with  plates    742 

De  Gournay  and  Suisse,  Mathet,  Hochstrate  appara- 
tus   837 

Deister  concentrator 2022 

at  the  Baltic  mill.     L.  S.  Austin 2023 

concentrators 1488 

at  mills  1489,  1680,  1896,  1900 

De  Kalb,  Courtenay,  adjustment  of  the  stamp  mill  2011 

amalgamation  inside  the  mortar 2024 

definition  of  slimes 1398 

De  Kalb  classifier 2020 

discussion  of  conditions  under  which  crushing 

is  effected     1326 

graphic  records  of  screening  tests    1340 

mechanics  of  ore  crushing    1340 

on  settling  tank 459 

slimes    1419 

sizing  test  on  sample  grinder    257 

stamp  mill  practice     2048 

standardization  of  screens  for  testing 2019 

tests  on  corundum    1184 

De  Kalb's  perforated-board  classifier 1402 

De  Lamar,  J.  R.,  on  Griffin  mill   284 

mill  1134 

Delameter  coal-testing  device     1993 

De  Laval  centrifugal  pumps  at  Mill  124 1695 

separator 827 

Delesse  on  magnetic  attraction 796 

Dellvik-Grondal  magnetic  separator   804 

Del  Mar,  A.,  advantages  of  stamps      2013 

discussion  of  plate  amalgamation 2024 

dredging,  cost  of 2036 

stamp  mill  experiences     2049 

milling  in  California 2045 

Deloro,  Ontario,  milling  at,  an  auriferous  mispickel 

at.     P.  Kirkegaard  2034 

Delprat,  G.  D.,  Broken  Hill  milling  practice    2038 

concentration  at  Broken  Hill 1568 

flotation  process 1555,  1561 

at  Mill  129 1561,  1718 

testing  for 1993 

ore  dressing  at  Broken  Hill 1923 

process  of  flotation.     D.  Clark 1568 

Demaret,  L.,  Bartle  pulverizer 294 

breakers 61 

Cornish  stamps 230 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


jig 
-She 


Demaret,  L.,  Husband  pneumatic  stamp  ...........      143 

mechanical  versus  hand  crushing    ............       61 

Nicholas  pulverizer     ........................     292 

stamps  and  other  pulverizers  .................      316 

tin  ores  in  Cornwall     .......................    1  185 

Tregoning  pulverizer    .......................      297 

Demond,  C.  D  .................................      viii 

on  electrolytic  dissociation  of  slimes   ..........    1414 

Denny,  G.  A.,  and  H.  S.     Rand  metallurgical  prac- 
tice .........................................    1923 

Rand  mill  equipment  ....................   2041 

design  and  working  of  gold  mill  equipment  .  .    1261 
equipment  of  stamp  mills    .................   2012 

hydraulic  stamp      ........................    1257 

mill  of  the  Van  Ryn  gold  mines  estate     .....   2041 

on  hand  picking  ..........................   2021 

sectional  guide  blocks  .....................    1269 

H.  S.,  discussion  of  grading  analysis  ..........   2048 

sizing  tests  on  slimes  and  sands     ...........   2019 

slime  treatment  on  the  Rand   ..............    1419 

Density  of  liquids  affecting  concentration    .........         3 

effect  on  free  settling    .  .  .  .  ^  ..............      465 

pulp  for  slime  tables  ......................      695 

Denton,  F.  W.,  crushing  .........................       57 

plant  at  Minnesota  Iron  mine   .............       57 

rolls  versus  steam  stamps  at  Mill  179     ........    1900 

Denver,  cost  of  mill  at  ...  .......................    1126 

Engineering  Works  Company,  Blake  breaker  .  .    1203 
gravity  stamps  .........................    1278 

grinding  machinery  .....................    1323 

revolving  grizzly  ...............  ........    1353 

Richards'  pulsator  classifier    .............    1388 

jig    .....................  1  .........    1459 

pard  spitzkasten  ...................    1401 

and  Richards'  pulsating  classifier  .....    1419 

rigid  rolls   .............................    1235 

at  Mill  181    .........................    1906 

scoop  feed  for  tube  mills  ................    1287 

tube  mill    .........................  1280,  1296 

at  Mill  143  ..........................    1770 

Fire  Clay  Company,  Case  laboratory  breaker  1204,  1223 
Depreciation  expenses  ...........................    1  123 

Depth  of  bank  in  trommels  ......................      380 

bed  on  concentrators  ........................    1510 

Harz  jigs  at  mills   .  .  1750,  1751,  1877,  1878,  1879, 

1929 
Hodge  jigs  at  Mill  180  ....  1902,  1903,  1904,  1905 

Derrick,  W.  H.,  tin  ore  in  the  Malay  Peninsula  ....    1182 

Derr,  Louis  ....................................     viii 

Derry,  W.,  Husband  stamp    .....................      143 

Description  of  Blake  breaker  .....................        13 

Desert  mill,  Tonapah,  Nevada.     A.  R.  Parsons  ____   2045 

Power  and  Mill  Company  ...................    1666 

life  of  shoes  and  dies  at  .................    1277 

Designation  of  holes  in  stamp  screens    ............      172 

Design  of  Blake  breakers    .......................    1201 

cams     ....................................     196 

classifiers  ..................................    1432 

electro-magnets   ............................     790 

machines  ..................................    1096 

milling  plants.     S.  A.  Worcester   .............   2049 

mills  .....................................  .1126 

mining  machinery.     S.  H.  Pearce  .............   2048 

A.  C.  McCallum  .....................  .....   2048 

rolls  ......................................       78 

settling  tanks  ...............................     454 

sulphide  mill,  150  ton.    A.  Harvey    ..........   2041 

two  small  mills.     S.  I.  Hallett  ................    2043 

Desloge,  J.  M.,  Blake  breakers  ...................       57 

Desloge  mill  for  lead  in  Missouri    ..........    1175 

mill    ..................  .  ..............  1175,  1185 

disposal  of  concentrates  in      ...............       57 

trunking  machine  in    .....................     587 

De  Soto  mine  ore,  Krom  air  jig  on  ...............     824 

Dessauer,  H.  A.  von,  temperature  of  water  for  amal- 
gamation ....................................     789 

Details  of  Blake  type  of  breakers  from  the  mills  ----       23 

cams,  table  of  ..............................      192 

clean-up  of  gravity  stamps   ..................     202 

Comet  breaker  .............................       41 

cost  of  crushing  by  breakers  ..................       49 

crushing  by  rolls  ..........................     104 

steam  stamps  ..........................      135 

dies      .....................................     180 

Dodge  breaker  from  mills  ...................       30 

dressing  and  cleaning  plates  .................     757 

inside  plates  ...............................      178 

jig  screens  ............................  .  ----     540 

McCully  gyratory  breaker  ............  .......       44 

rings  from  mills,  table  of  ....................     122 


Details  of  screens 168,  170 

for  stamps,  table  of 121 

spindle  breakers  in  the  mills 46 

stamp  bosses 186 

cams      192 

shaft,  table  of    128 

stem 187 

tappets    189 

staves  from  mills,  table  of    123 

steam  stamps 12& 

Sturtevant  roll  jaw  breaker 33 

trommels 347 

valve  action 127 


whole  current  box  classifiers 

Detroit  Copper  Mining  Company  of  Arizona . . 

milling  practice  of  the  

sizing  test  of  Bryan  mill  product  at  . . 

Development,  effect  on  mining  cost 

Devices  for  safety  on  steam  stamps 

used  on  convex  slime  tables  

Devonshire,  kaolin  washing  in 

Dewaterers  at  Mill  138  

Dewaterer,  shovel 

Dewatering  device  at  Mill  141 

screens 


444,  446 
. ..  1874 
. . .  2041 
. ..  1310 
. ..  1128 
. . .  127 
. . .  689 
. ..  1077 
...  1745 
. ..  2032 
. ..  1760 
1591 


at  mills 1858,  1867 

Fitzgerald 2032 

Rogers'  dewatering  screen 1591 

shaking  launder  at  Mill  172 1872 

wheels     1590 

at  mills    1591,  1725,  1772,  1773,  1878,  1879 

Fleming 1590,  1609,  2031 

Dewey,  C.  E.,  Blake  breaker  versus  Dodge 57 

on  breakers    57 

sizing  tests  of  jig  products 642 

Diagram  of  sizing  tests  of  products  of  Tustin  -mill 

and  stamps 309 

Dial  cocks    .     858- 

for  classifiers 387,  388 

gravity  stamps 199 

on  jigs     538 

Diamagnetic  substances     796 

Diameter  of  classifier  spigots    404 

iron  pipe     405 

rolls 83 

shafts  in  jigs    533 

slime  tables    696 

trommels 349 

effect  of 379 

wire  for  screens 371 

Diameters  and  velocities  of  quartz  grains 2003,  2004, 

2005,  2006 

areas  of  circles 2000,  2001,  2002,  2003 

of  stamp  shoes  and  dies 181 

Diametral  ratio  between  quartz  and  galena  hindered 

settling    1460 

Diamond  dressing  in  S.  Africa.     A.  F.  Williams 2040 

fields  of  South  Africa,  washing  pans  used  in  ...     333 

pans 335 

specific  gravity  of   1189 

washing 839,  1080,  1178,  1179,  1185 

at  Mill  188    1921 

in  Africa.     R.  Stokes 2046 

W.  H.  Mungall 2034 

Brazil.    H.  W.  Furniss 2038 

South  Africa 333,  2033,  2040,  2042 

G.F.Williams 2043 

tube  mills  for 2014 

Diamondiferous  earth,  washing  pan  for 335 

Diamonds  recovered  by  greased  plate 831 

separated  by  weathering 830 

Diaspore,  specific  gravity  of 1189 

Diepenlinchen,  jigging  four  minerals  at 590 

Luhrig  tables  at    670 

mill,  jigs  in 597 

Die  rings  and  roller  shells  in  Huntington  mills 280 

for  Huntington  mill   280 

Dies    174 

and  shoes  for  grinding  pans,  wear  of 1289- 

at  Mill  117 1668 

fdr  amalgamating  pans    245 

gravity  stamps,  life  of    1277 

steam  stamp 120 

weight,  life,  etc 122 

life  of    184 

table  of  details  of 180 

Diescher  coal  jig    520,  640 

connecting  rod  for 530 

Differential-motion  jig,  Hodge  jig 1444 

New  Century  jig 1445 


31 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Differential  motion,  Woodbury  jig 1447 

variable-crank  mechanism  for  jigs 1457 

Difficulties  in  concentration    892 

of  dredging 1009 

screening 372 

Dillon  concentrator 2022,  2023 

Iron  Works,  Perfection  ore  feeder 1578,  1609 

Dillsboro,  North  Carolina,  kaolin  washing  at 1149 

Dilution  of  fine  slimes 1121 

Dimensions  of  Abbe"  tube  mills  at  Mill  101 1626 

Comet  breaker 44 

Ding's  magnetic  separators 1541 

jig  sieves    59 1 

Linkenbach  pointed  boxes 441 

Richards'  pulsator  jig,  table  of 1455 

shoes  and  dies 181 

stamp  dies   180 

mortars 165 

Sturtevant  balanced  rolls,  table  of 1234 

tappets    189 

tube  mills  at  Mill  103   1632 

Wetherill  magnetic  separators,  table  of 1522 

Dimmick  classifier 1417,  1420,  2020 

J.  O.,  on  classification 2020 

sizing  before  amalgamation 1514,  1520 

&  Son,  distributing  launder 1417 

patent  slime  table 1507 

Ding  Electromagnetic  Separator  Company,  the  Ding 

separator 1540,  1568,  2029 

at  mills 1541,  1663,  1737,  1739,  1759 

description  of  the   2027 

table  of  weights,  dimensions,  and  power  for. .  1541 

roasting  furnace 1548 

at  Tripoli  mine 1548 

Dingey  mill    233 

bibliography  for 293 

Diorite,  strength  of 301 

Dipper  dredge 1007,  1011 

sample 845 

Direction  of  rotation  for  tube  mills 1289 

Direct  pumps 871 

smelting,  cost  of    1 

Dirt 900 

Disadvantages  of  gravity  stamps  as  compared  with 

rolls  and  grinders   222 

Krom  jig 825 

springs  on  jigs 517 

Disc  conveyors 1583 

at  mills  1583,  1695 

motion  for  accelerated  jigs    536 

Discharge,  bell,  for  jig  concentrates 506 

for  jig 510,  518,  553,  576,  577 

concentrates 500 

in  Krupp  Harz  jig  1446 

New  Century  jig 1445 

Woodbury  jig 1448 

Leavitt  steam  stamp 993 

steam  stamps 129,  1003 

Krause  mortar  and  mortar  jig 1256 

tube  mills  1287 

into  the  hutch  in  jigs 586 

of  belt  conveyors 860 

elevators 862 

jig  concentrates  by  rakes 502 

ore  bins 842 

products  on  Hooper  air  jig 821 

settling  tanks 458 

stamps,  area  of   209 

height  of 212 

roll  for  vanner  concentrates    647 

with  unwatering  sieves 586 

Discussion  of  design  of  Blake  breakers,  by  W.  G. 

Bryant 1201 

sorting  tube  results 467 

Disintegrating  and  screening 839 

Disintegration  and  screening  for  graphite  ore 1074 

followed  by  screening 830 

settling    830 

Disintegrators    236 

and  pulverizers    1319 

bibliography  for 299 

Bourdais 899 

Brink  and  Hiibner   284 

Carr 284 

Stedman 284 

Vapart's    289 

Dispersion  of  magnetic  lines 791 

Displacement  pumps    1589 

Disposal  of  concentrates   586 


tailings   1113 


Dissemination  of  mineral  affecting  crushing  limit  . .  .  304 
Distances  between  rolls  for  various  angles,  in  author's 

tests 311 

Distillation  of  mercury 782 

Distilled  water,  effect  of  in  settling 474 

Distl-Susky  screw  grate  screen 386 

Distributing  conveyor 861 

at  Mill  143 1769 

devices 1417 

or  sizing  launder 1417 

tanks 449,  1115 

Distribution  of  amalgam  from  plates    764 

gold  recovered  in  mill    749 

pulp  in  settling  tanks 451 

Distributors   857 

at  Mill  126 1707,  1708 

bibliography  for 884 

Blaisdell   1600 

centrifugal  sand  distributor 1602 

Butters  &  Mein  at  Mill  106 1641 

for  amalgamated  plates 743 

buddies 704,  706 

canvas  tables 700,  701 

feed  on  Roberts'  slime  tables 691 

slime  table  feed  and  water   688 

stamp  mills 772 

vanners 646 

machine    857 

mill 857 

revolving  distributor  or  divider 1418 

Ditches  for  water 1 105 

Dives-Pelican  Mine,  Samson  breaker  at 1203 

Robert,  advantages  of  hand  picking 493 

Dividend  gold  saver 2030 

Division  of  concentrating      318 

mills  for  different  ores 1111 

Dodd  buddle.     G.  Attwood 2022 

buddle  at  Mill  96 1481 

disc  water  wheel 1022 

table    675 

tables  at  Mill  96 1618 

water  wheels    1024,  1089,  1090 

W.  G viii 

on  amalgamating  pan 248 

Dodge  breaker 28,  56,  60 

at  Mill  183    1913 

compared  with  Blake 33 

Humboldttype    1206 

improvements  on  in  Mill  26 35 

movements  on,  made  by   Gates   Iron  Works  34 

Parke  and  Lacy  Company    34 

perspective  of 29 

section  of 30 

sizes  of    30 

Sturtevant-D'odge  type  breaker 1205 

table  of  details 30 

used  in  stamp  mills    1014 

wear  of 31 

M.  B 28 

jaw  breaker 28 

mill,  bibliography   for 294 

pulverizers 231,  233,  262 

number  used 231 

sizing  box    416,  478 

Dolbear,  Clinton  E.,  electrostatic  separation 1550 

Dolcoath  mill 1082 

Cornwall,     concentration     at     the.     R.     A. 

Thomas 2040 

strips     1082 

tin  mill    1183 

Dolgelly,  Wales,  mill  at 1072 

Dolomite,  with  disseminated  galena,  crushed  in  Mill 

25..... 47,  98 

ore,  weight  of 1190 

specific  gravity  of   1189 

Domeykite,  specific  gravity  of    1189 

Donahue,  P.  J.,  oiling  device  for  amalgamating  pan  247 

Donald,  J.  T.,  Cylcone  fibreizer    298 

Dornberg  and  Aurora  mill    1177 

classifiers  at 477 

sieve  scale  at   367 

and  Aurora  works,  sizes  of  ore  hand  picked  at . .  487 

mill,  jigs  at 641 

Dorotheer  mill    973 

Dorr  classifier  at  Mill  103 1632 

of   Lundberg,  Dorr,   and  Wilson,   Black 

Hills,  South  Dakota 1344 

Dorr  John  V.  N.,  Dorr  mechanical  classifier.  .475, 476, 

477,  1343 

Double-cone  classifiers 426 


32 


Pages  1199-1610,  Vol.  III. 

Double-cone  classifiers  at  Mill  117 1668, 

hydraulic  classifier    

table  of  sizes  4 

tubular  classifiers    

Double  crimped  wire  screens    

screens ...  


INDEX. 


Pages  1611-2052,  Vol.  IV. 


discharge  for  jigs 
ylor 


mortar,  Traylor  .......................... 

on  stamps  ............................... 

eccentrics  for  jigs   .......................... 

iron  frame  for  jig  sieves    .................... 

issue  in  stamps  ............................. 

-Rittinger  sieve  scale    ....................... 

trough  classifiers  ............................ 

Douglas  Island,  Alaska,  cost  of  producing  gold  in  ... 

mill  at  .................................. 

mortar  blocks  on  ......................... 

Douglas,  James.     Blake,  Dodge,  Forster,  Comet,  and 
Gates  breakers  ............................... 

breakers    ................................ 

gravity  stamps  ........................... 

Harz  jigs  ................................ 

ore  dressing   ..........  '.  ...........  ....... 

principles    and    operations  of    crushing  and 
grinding  machinery  ..................... 

J.  Jr.,  Ball  stamps   ...  ...................... 

on  cost  of  crushing  by  steam  stamps    ....... 

Drag  conveyors  ............................  1582, 

Dragon  breaker     ............................... 

Dragstone  mill  ..........................  ".  ...... 

Drained  ore,  moisture  in  ........................ 

Drake,  F.  M.,  gold  stamp  mill  of  Wentworth  Com- 
pany at  Lucknow,  New  South  Wales    ........... 

plates  in  Wentworth  mill,  Lucknow,  Australia. 
shoes  and  dies  ............................ 

Wentworth  Goldfields,  Proprietary  Co.,  stamps 
at,  New  South  Wales  ................... 

W.  F.,  amalgamation  ........................ 

on  temperature  of  amalgamation  ........... 

Draper's  dry  concentrator  in  Australia    ........... 

Dredge    ....................................... 

at  Ruby,  Montana   ......................... 

bucket  in  New  Zealand  ...................... 

current  motor    ............................. 

for  phosphate  .............................. 

limit  for  Stewart  River  district,  Alaska.      A.  W. 
Robinson  ................................ 

New  Zealand  gold.     J.  P.  Smith  ............. 

yield  of  a  California  ....................... 

Dredges  and  equipment,  cost  of  .................. 

at  Ruby,  Montana,  electrical    ............ 

Bucyrus  ................................... 

comparison  of  American  and  European.    F.  C. 
Perkins  .................................. 

old  and  modern  style  .................... 

construction  and  operation  of.     D.  K.  Blair  .  .  . 
detailed  comparison  of.     R.  L.  Montague  ..... 

different  types  of.     B.  Cunningham    .......... 

electrical  equipment  of  gold.     C.  W.  Whitney  .  . 
history  of.     J.  P.  Hutchins    ................. 

hydraulic  power  for  ......................... 

improvements  in  gold.     G.  E.  Walsh  ......... 

revolving  versus  shaking  screen  in    .  .  ......... 

riffles  for  .................................. 

Risdon  .................................... 

Dredging  ...................................... 

P.  G.  Morgan  ............................ 

amalgamated  plates  and  riffles  in  gold.     J.  M. 
Sweeney    ................................ 

article  on  gold.     R.  H.  Postlewaite  ........... 

at  Boise,  Idaho  ............................. 

Golden,  Colorado.     K.  Thomas    ........... 

Nome,  Alaska.     J.  P.  Hutchins  ............ 

gold,  G.  P.  Grimsley  .................... 

Oroville,  California  ..................  2037, 

N.  B.  Knox  ............................ 

Ruby,  Montana,  gold.     J.  P.  Hutchins  ...... 

by  the  Oroville  Dredging  Co.,  California  ...... 

water  power.     J.  M.  Gowan    .............. 

cost  data  on.     Alex.  Del  Mar    ............... 

cost  of  .  ................................... 

gold     ................................... 

discussion  on.    L.  J.  Hahl  ................... 

for  gold  ..........................  1007,  1181, 

tables  for  .............................. 

g°A.  W.  Robinson  .'  .'  .'  ."  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  2035, 
T.    F.  VanWagenen    .................... 

W.  S.  Russell  .  .   ....................... 


1669 

1381 

1381 

476 

370 

354 

583 

1266 

209 

531 

540 

167 

1361 

416 

1975, 

1977 

1133 

148 

57 
55 

224 
640 
1175 

2017 
142 
134 

1583 

58 

237 

1107 

1181 
788 
181 

227 

789 

767 
2029 

898 
2043 
2037 
2044 

897 

2037 
2046 
2037 
1654 
204t 
1654 

2042 
2044 
2034 
2034 
2035 
2041 
2037 
2036 
2037 
1653 
722 
1654 
1652 
2036 

2041 
2041 
2043 
2046 
2039 
2036 
2044 
2040 
2039 
2044 
2046 
2036 
1654 
2046 
2037 
1182 
703 
2046 
2041 
2043 
2041 


Dredging  gold,  how  to  make  it  pay. 
saving  tables  used  in.     C. 


33 


A.W.Robinson..  2035 

saving  tables  used  in.     C.  W.  Purington 2041 

ground,  testing  of,     R.  M.  Downie  . .  2043 

in  Alaska.     O.  Halla '.  2045 

gold.     C.  A.  Tupper    2041 

Borneo,  gold    .  2036 

Brazil.    F.  C.  Nicholas 2046 

British  Columbia.     R.  L.  Watson 2041 

California 2042 

A.  G.  Hillen 2046 

L.  E.  Aubury 1924 

costs  of 2045 

details  of.     G.  P.  Grimsley 2036 

notes  on.     L.  J.  Hohl   ,      . .  2044 

Colorado,    cost    of.       W.  E.  Thorne,  E.   J. 

Moore     2045 

Europe.     L.  St.  Rainier    . .  2047 

Grasshopper  Creek.     R.  W.  Bell 2041 

Guiana,  S.  America.     O.  Rehwagen 2039 

Hungary  and  Transylvania     2040 

Idaho.    F.  Powell 2036 

New  South  Wales 2034 

failure  of  gold.    D.  K.  Blair 2034 

successful  tin 2034 

unsuccessful 2034 

New  Zealand 2043 

J.  W.  Gray    2043 

F.  W.  Payne   2039 

D.  B.  Sellars   2043 

gold 2036 

A.  C.  Perkins . .  2041 

1906,  gold.    J.  P.  Hutchins 2038 

Oregon   2043 

Russia 2043 

Siberia.     C.  W.  Purington  and  J.  R.  Land- 
field,  Jr -. .-.  2035 

Tierra  del  Fuego 2039 

J.  D.  Roberts 2040 

Venezuela.     F.  Owen 2036 

modern  gold.     H.  G.  Clark   2046 

on  the  Feather  River,  California 2043 

Klondike.     J.  P.  Hutchins 2038 

Saskatchewan.    I.  Cowie    2034 

Snake  River,  Idaho.    R.  Bell 2036 

operation,  returns  from    2046 

plants    1006 

pneumatic  tube  in 2044 

power  plants  for   2036 

prospecting  and  operation.     R.  H.  Postlewaite  .  2040 

river.     C.  C.  Longridge 2036 

sluice  extension  versus  elevator  in  2045 

sluices  and  riffles  in.     D.  H.  Stovall 2045 

tin 2040 

tables  for    703 

with  a  Hammond  dredge 2036 

Dressing  of  belts 1093 

of  plates   756 

plates  at  Mill  114 1663 

tin  ore 1081 

Driers 879,  880,  1595,  1609 

American  Process  Company  driers    1597 

and  drying  of  ore.     P.  Argall 1609 

Argall  cylindrical  driers 1599 

at  mills 1762,  1807,  1813,  1822,  1860,  1917 

capacity  of  drying  floors  versus  mechanical  driers  1596 

classification  of   1595 

cylindrical  driers     1596 

drying  floors 1596 

Edison  tower  drier   1600 

Grill  four-compartment  direct  heat  driers 1596 

J.  R.  Alsing  Company  driers 1597 

ore.    C.  O.  Bartlett 2031 

revolving,  at  Mill  138 1746 

cylindrical  drier  at  Mill  135 1735 

shaft,  at  Mill  151   1803 

Drifting  tool  for  stamp  cams    193 

Drifton,  Luhrig  jig  at    640 

rolls  at HO 

Drill  points  in  mills   1115 

Driver  in  amalgamating  pan      247 

Driving  mechanism  for  cam  shafts   197 

clutches    198 

gearing    198 

gravity  stamps 197 

rolls     75 

tightener 198 

trommels 356 

table  of     76 

Drop  between  jig  sieves  524,  549 

plates 743 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Drop  hammers 12 

limits  of  speed  and  height  of,  due  to  mortar    . .  218 

maintaining  height  of  in  gravity  stamps 200 

of  gravity  stamps,  order  of 1274 

on  amalgamated  plates 737 

order  of.     C.  S.  Richardson 1278 

for  stamps    214 

Drops  in  amalgamated  plates 733 

number  of  in  gravity  stamps 214 

of  stamps,  number  and  height  of 215 

Tremain  stamp,  number  of 138 

Drumlummon  mine  ore 1027,  1040 

Drum  magnetic  separators 797 

Dry  blanket  method  of  concentration 825 

blowing  in  prospecting  for  gold  ores 2029 

concentration 815 

at  Manhattan,  Nevada.     C.  T.  Rice    2027 

Roseberry 2047 

Round  Mt.,  Nevada.     G.  A.  Packard   ....  2038 

bibliography  for 837 

in  Australia.     B.  Dunstan 2027 

Australia,  comparison  of 2030 

on  the  Cammett  table    2022 

crusher,  Langley's  improved 274 

crushing  and  cyaniding  at  the  Luipardsvlei  mine. 

F.  White,  G.  H.  Furnee    2047 

by  Edison  process 2010 

stamps 226 

in  Colorado  1244 

rolls  for  1224 

house  for  men 1 102 

magnetic  separator,  Conkling 809 

-ore  sizer,  Keedy 1555 

pan,  for  clay  1075 

panning  and  blowing 825 

placer  machine  838,  839 

screening  versus  wet 1139 

separation  890,  891 

separator  used  in  Germany 2029 

silver  mill 1039 

milling 1176 

stamping 221 

at  Ontario  mill  210 

table,  Sutton,  Steele  &  Steele  1554 

vanner 838 

Dryers.    See  Driers. 

Drying  bin  at  mills 1625,  1669,  1705,  1912 

for  concentrates 1570 

floors 880,  1596 

at  Mill  143 1770 

in  kilns 899 

iron  ore  1054 

kaolin  1077 

necessary  for  air  concentration 826 

of  clay 1077 

of  ores.  W.  R.  Ingalls 1610 

slimes  at  Mill  129 1717 

use  of  hot  fines  for  drying  coarse  ore  at  Mill  158 . .  1826 

Dubuat,  M.,  Hydraulique  et  Pyrodynamique xix 

launders 885 

on  transporting  power  of  water  878 

Duck  for  canvas  tables  700,  701 

at  mills 1696,  1755,  1779 

Dudley,  A.  P.,  spring  for  Collom  jig  517 

W.  L.,  amalgams  787 

Dufferin  mill   1099 

Duffield,  P.  W 1181 

and  W.  McDermott,  amalgamated  shaking  plates  787 

gold  amalgamation  1173 

hand  jig 1182 

on  amalgamated  plates  741 

testing  jigs 1151 

Dummler,  K.,  crushing  and  washing  clays  1173 

Handbuch xix 

Dump  at  Mine  La  Motte,  Missouri,  treating  the  old  2045 

for  tailings  1113 

of  the  Bellevue  Colliery,  method  of  working. 

G.  W.  Harris    2041 

Dunham's  spring  stamp 141,  143 

Dunlap  Manufacturing  Company,  perfect  clay  screen  1357 

Dunnellon,  Florida,  mill  at     899 

Phosphate  Co.,  mill xxv,  899 

Duplex  breaker     60 

of  Blake  type 21 

Callow  screens  at  Mill  123 1689 

vacuum-pumps  at  Mill  117 1673 

Dupont,  O.,  and   Ch.    Quehant,   dressing  lead  and 

zinc  in  Belgmm     1185 

Durango,  sectional  iron  stamp  frame  for 161 

Dust  blown  from  coal   817 


Dust  chambers    885 

difficulty  of  concentrating   820 

fans  and  chambers 883 

in  dry  concentration 825 

prevention 1099 

removed  by  air  blast 816 

remover  at  Mill  141 1762,  1763 

separator 828 

at  Mill  151    1803 

settler  at  Mill  135    1736 

settling  apparatus.    T.  White 2032 

device    2032 

system  at  Mill  141    1764 

Dusting  chambers,  Edison    816 

Duty  or  capacity  of  trommels 359 

Dyckhoff  breaker 57 

Dynamo  for  lighting 1100 


Eagle  Foundry  Co.,  rolls 76 

West  Va.,  Stedman  disintegrator  at 285 

Eames,  W.  H 289 

Earnschleugh  dredge  No.  2 1179 

dredge,  tables  on 703 

Earth  in  bank,  weight  of 1190 

Ease  of  separation  affecting  capacity  of  jigs   601 

extraction 1117 

number  of  jig  sieves 589 

Eastern  United  States,  cost  of  producing  iron  ore 

concentrates  in 1986,  1987 

Eastman,  G.  W.,  analysis  of  work  on  free-settling 

velocities 1423 

Eastwood  improved  lifting  magnet 1532 

at  MiU  164 1532 

Eccentric  for  jigs 510,  531 

gears  for  steam  stamp  valve  motion  123 

grinders    313 

jig,  the  Bradford 400 

mill.    James  Bogardus 259 

Eckart  rolls   Ill 

Economic  minerals  in  mills xxv 

Economy  of  hand  picking 487 

large  engines    1092 

picking  out  rich  ore   481 

Eddies  in  riffles 721 

Eddy  current  in  classifiers 437 

Electric  Mfg.  Co.,  dynamos    1062 

Edge  runners    234,  269,  1305 

bibliography  for 295 

Bryan  roller  quartz 271 

»          compound 296 

Langley's  improved  dry  crusher   274 

Edgestone  mills 235,  269,  1075 

for  graphite  ores 1075 

Edison  concentrating  plant 834 

corrugated  rolls 106 

at  Mill  152 1806 

distributing  conveyor   861 

distributor      858 

dry  gold  separation  process.    C.  M.  Chapman  .  2027 

drying  kiln    • 881,  1600 

dusting  chambers 816 

giant  rolls 105 

magnetic  concentration  mill 1056 

concentrating  plant,  New  Jersey  and  Pennsyl- 
vania Concentrating  Company  mill xxix 

mill 1183,  1184 

plant   1179 

separator  for  fine  materials    810 

method  of  preventing  blinding  of  screens 373 

New  Jersey,  mill  at 1056 

on  life  of  belts 864 

opinion  on  shape  of  hole  in  screens 369 

process  of  crushing 2010 

screens 341 

separator 812 

smooth  rolls  at  Mill  152 1806 

special  forms  of  rolls 110,  111 

sprocket  drive 860 

stationary  screens   341 

three-high  rolls    107,  2010 

T.  A.,  on  belts 1094 

and  J.  Birkinbine,  Blake  system 57 

Buchanan,   Wenstrom,   Conkling,    Mon- 
arch and  Edison  separators 833 

on  blinding  of  screens 373 

breakers '57 

lubrication 1098 

magnetic  concentration    1058 


34 


Pages  1199-1610,  Vol.  III. 

Edison,  T.  A.  on  power  for  crushing  .... 

mills 

trajectory  in  screening 

tower  screen  at  Mill  152 

Edman,  J.  A.,  arrastra 


....  310 

....  1093 

....  369 

....  1809 

....  290 

Edwards,  G.  E.,  Woodbury  jigging  system 2022 

*.,  &  Co.,  on  centrifugal  pumps 869,  870 


J.  H.,  on  Griffin  mill 

R.  M 

W.  M.,  Helena  and  Frisco  mill,  Idaho 

Effectiveness  of  blow  of  gravity  stamps   

Effect  of  acid  water  on  screens    

air  currents  on  mechanical  sampling 

carbon  in  roasting  for  magnetism 

centrifugal  force  in  trommels 

dissolved  substances  in  settling  fine  slimes  . 

explosives 

length  and  slope  of  trommel  on  capacity.  .  . 
slope  of  trommel  on  capacity . . . 


284 
viii 

1178 
218 
173 

1576 

1544 
373 

1147 
9 

378 
377 


speed  on  capacity  of  a  trommel  ............  379 

strength  and  specific  gravity  of  rocks  on  power 

used  ................................  373 

temperature  on  amalgamation  ..............  766 


at  Mill  106 
weathering  on  flotation  process  results  at  Mill 


1640 
1724 


130  ... 
on  capacity  of  trommels  of  varying  the  diameter     379 

Efficiency  of  classifier  jig  at  Mill  120     1452 

cocoa  matting  tables  at  Mill  111     1657 

gravity  stamps 

Hancock  jig,  quality  of  work . .  . 

labor,  effect  on  costs 

pumps 

rolls.  .  . 


219 
1441 
1127 
868 
109 
1095 
1587 


rope  transmission 

sand  wheel 

steam  stamps 131,  133 

and  gravity  stamps  compared 134 

tube  mill 1292 

water  wheels 1089,  1090 

Egleston,  T.,  Allouez  and  Atlantic  mines 1174 

amalgamating  pans    290,  291 

amalgamation    , 787 

arrastra 289 

ball  mills 293 

Ball  stamp   142 

Blake  breaker 57,  58 

edge  runners    295 

estimate  by,  of  wear  of  iron  in  pans    249 

Gates  breaker    56 

gravity  stamps 223,  224,  225 

hand  picking  at  the  Allouez  Copper  Mine,  Lake 

Superior 492 

Huntington  mill 296 

hydraulicking 1173 

jigs  at  Tombstone  stamp  mill 639 

Krom  rolls 109,  110 

Lowe's  mill    294 

metallurgy    xix 

non-amalgamation 1174 

on  breakers 56,  57,  58 

mortars 164,  165 

silver  amalgamation 1039 

stamp  frames 153 


wear  of  amalgamating  pans  249 

stamping  and  washing  at  the  Allouez  mine  ...  142 

Tustin  mill 294 

Ehmke's  ball  mill 293 

Eich,  L.,  on  impurities  in  amalgam 251 

Eissler,  M.,  amalgamating  pans 290 

silver 1173 

amalgamation  787 

Blake  breaker  56 

Dodge  and  Krom  breakers 56 

breakers  56 

Cyclops  mill  294 

definition  of  slimes 1398 

Gates  and  Krom  rolls 109 

breaker 56 

gold  stamp  milling  1173 

gravity  stamp  clutches 198 

stamps 223 

Green's  movable  sieve  jig 639 

Griison  ball  mill 293 

Harz  and  Collom  jigs  639 

Huntington  mill 297 

Krom  jig 837 

metallurgy  of  gold xix 

silver xix 

mortar  linings 166 


INDEX.  Pages  1611-2052,  Vol.  IV. 

Eissler,  M.,  pointed  boxes,  spitzlutte,  cone  classifier  . .  476 

silver  amalgamation 1039 

stamp  frames 153 

El  Bote  mill,  Zacatecas,  Mexico    1408 

El  Callao  mill,  cost  of  milling  at 1127 

Electrical  driving  of  stamp  batteries 2012 

Electric  Controller  &  Supply  Company 1532 

cobbing  magnet  at  Mill  164 1850 

current.     See  also  Power. 

for  electroplating  copper  plates    755 

on  amalgamated  plates 740    752 

lights     *noo 

for  hand  picking     481 

power  in  mills.     See  Individual  Mills  in  Chapter 

for  mills    1089,  1091 

plant  at  Mill  177 1895 

separator,  discussion  of  various 2026 

Electricity  versus  steam  as  a  motive  power 1927 

Electro-conductivity    1611 

Electrolytes  for  slime  settling,  relative  values  of  ....  1414 

Electrolytic  action  on  amalgamated  plates 749 

Electromagnet,  hand 812 

Electromagnetic  and  electrostatic  separators,  general 

discussions  of.     W.  M.  Johnson    2025 

separator,  Ball-Norton 1568 

Ding    1568 

Eriksson's   1529 

Forsgren's 1538 

Electromagnets,  design  of 790 

Electroplating  copper  plates 754 

Electrostatic  and  electromagnetic  separators,  general 

discussion  of.     W.  M.  Johnson 2025 

separation 2030 

article  on 2026 

at  Mill  151 1804 

of  copper  ore,  discussion  of.    W.  G.  Swart  . .  2026 

various  zinc  blendes 1550 

principles  of 1199,  1549 

separator 1549 

Blake-Morscher  electrical  ore  separator 1550 

description  of  a  generator  for 2027 

discussion  of  principle  of.     J.  M.  McClave  .  2026 

Huff 1551 

lists  of  good  and  poor  conducting  minerals  . .  1550 

Sutton-Steele    1568 

Electrum,  specific  gravity  of 1189 

Elevating  conveyor 861 

wheels 864 

Elevator  boot  as  unwatering  box 450 

Elevators  862,  1586 

For  position  see  Individual  Mills  in  Chapter  XX 

at  mills..  1661,  1663,  1667,  1681,  1685,  1689,  1690, 

1691,  1693,  1700,  1702,  1703,  1707,  1710,  1711,  1715, 

1725,  1727,  1728,  1729,  1737,  1738,  1742,  1743, 

1749,  1750,  1752,  1753,  1755,  1756,  1759,  1760, 

1762,  1763,  1769,  1771,  1772,  1774,  1792,  1793,  1804, 

1818,  1819,  1829,  1837,  1839,  1840,  1842,  1843,  1844, 

1845,  1846,  1847,  1853,  1854,  1855,  1857,  1858,  1866, 

1867,  1869,  1870,  1877,  1880,  1883,  1888,  1889,  1890, 
1898,  1910,  1928,  1929,  1930 

bibliography  for 884 

bucket 862 

centrifugal  sand  pump 1588 

details  regarding  running  of.     E.  S.  Wiard 2032 

displacement  pumps 1589 

for  dredges 1012 

tailings 1113 

in  mills,  use  of      1086 

John  A.  Traylor  centrifugal  pumps 1588 

Lancaster  rotary  pumps 1589 

or  raff  wheel  for  Wilfley  table    1468 

platform   864 

sand  pumps 1587 

wheels     1586 

wheel  agitator  used  for    780 

Wilfley 2031 

Elkton  mine,  ore  washing  at 1616 

Ellenbecker  spring  stamp 141 

table    681 

Elliott  coal  washer  and  Hardy  dust  extractor.     E. 

Greaves 2051 

Elliptical  gear  for  jigs    536 

mechanism  for  bumping  tables 681 

Ellis  concentrator   1499 

vanner 657 

Elmore,  A.  S.,  flotation  process 1555,  2028,  2035 

oil  concentration  mill 1070,  1072,  1117 

process 831,  1183,  2026 

advantages  of  the  2026 


35 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Elmore,  oil  process  in  Cornwall.     M.  Baldauf 2047 

Ore  Concentrating  Company 1993 

plant,  London,  England    2035 

process    1 155 

at  Dolcoath.    E.  Walker 2039 

the  Tywarnhaile    copper    mine,   Cornwall, 

England   2038 

C.  M.  Rolker 2025 

E.  Walker 1569 

failure  of 2029 

for  Slocan  ores 2025 

in  diamond  washing 2026 

Rossland,  failure  of 2025 

saves  93  percent,  of  values 2029 

statement  on  the.    F.  H.  Claudet 2025 

testing  for 1993 

tests  on,  at  Glasdir  mine,  Wales 832 

results  of 2049 

vacuum    notation   process,  description    of    the. 

A.  S.  Elmore 1569,  2027 

E.  Walker 2027 

oil  process 1556,  2026,  2030 

at  Cornwall,  England 1559 

Mill  141   1765 

consumption  of  oil   1560 

description  of  the.    F.  H.  Prentiss   2027 

in  Sweden 1560 

El  Oro  cast-iron  ribbed  liners  for  tube  mills  at  Mill 

118 1677 

district,    Mexico,    cost    of    producing  gold    in 

1980,  1981 

lining  for  tube  mills 1340 

Mining  and  Railway  Company   1676 

tube  mill  lining 2014,  2015,  2016 

El  Paso  Foundry  rolls  at  Mill  151 1803 

smelter,  sampling  at 884 

El  Potrerito  mill 1665 

El  Silencio  mill,  fineness  of  amalgam  in 763 

Elspass  mill 1280,  1323 

Elutriation 830,  1611 

for  emery  1079 

use  made  of,  in  mills 889 

Embrey  varmer   653 

testing 1171 

Emery  mill  at  Mill  186 1918 

ore,  mill  for 1079 

separated  by  magnets 790 

washing 333 

wheel  for  truing  roll  shells 70,  1243 

Emmons,  S.  F.,  gold  stamp  mills  in  Maryland 1175 

and  G.  F.  Becker,  amalgamating  pans 291 

amalgamation    789 

arrastra 290 

edge  runners 295 

Empire  mill xxvii,  1020 

Plattesville,  Wisconsin 2038 

stamp  mill   1184 

Zinc  Company    1759 

mill    907 

Ems    1102 

Linkenbach  V-box  classifier  at    421 

mill  at 1087,  1135 

number  of  sieves  on  jigs  at    590 

sieve  scale  at   367 

Enargite,  specific  gravity  of   1189 

End-bump  group  of  tables 1497 

tables 667,  680,  1464 

comparison  with  side-bump    682 

Ellenbecker  table   681 

Gilpin  County  concentrator 683 

Golden  Gate  concentrator 681 

Imlay 681 

Endless  belt     1094 

conveyors   859 

chain  conveyor 860 

End-shake  vanners 652,  1165,  1500 

Akens  and  Evans  slimer   1500 

Embrey  concentrator 653 

for  testing    1153 

Triumph  concentrator 652 

versus  side-shake     655 

vibration  in    658 

Woodbury 655 

Energy  of  gravity  stamps    219 

steam  stamps •  •  •      133 

Engelmann,  H.,  air  versus  water  jigging,  Utsch  side 

plunger  jig 640 

Engines    used    in   mills.     See    Individual    Mills    in 
Chapter  XX. 
in  mills...      1091 


Engis,  air  classifier  at 

classifier   . . 


817 

475,  477 

English  standard  gauge     1194 

steel  for  shoes  and  dies    185 

system  of  jigging     1463 

Enterprise  mill,  Plattesville,  Wisconsin 2038 

E.  P.  Allis  Company   ..72,  76,   111,   181,   187,   189,    194, 

197,  228,  243,  245 

batea  made  by 683 

dies  made  by     245 

edge  runner  made  by     270 

inside  plates 178 

muller  and  shoes  made  by    246 

power  for  5-foot  pans  estimated  by     249 

shoe  and  die  channels  in  amalgamating  pans 

by , 247 

weights  of  spider  and  driving  cone  made  by .     247 

Epidote,  hindered-settling  test  on    617,  621 

settling  velocity  of 466,  469 

specific  gravity  of   1 189 

Equipment  of  gold  mills.     G.  A.  Denny 2012 

Equivalents  of  weights  and  measures • 1187 

Erbium,  atomic  weight  of     1188 

Erecting  mills,  costs  of    1124,  1939 

Eriksson's  electromagnetic  separator    1529 

Ernst,  C.  von,  separator  at  Monteponi 836 

Errors  of  small  tests     1168 

Erythrite,  specific  gravity  of     1189 

Eschka,  A.,  separation  at  Przibram     836 

Espiritu  Santo  mill  at  Cana,  Darien.    E.  R.  Woakes  2033 

plates  in 788 

Essential  qualities  of  classifiers 389 

Essentials  of  a  good  breaker 49 

Esser  concentrator    2023 

Estimates  on  cost  of  hand  picking 487 

Eureka  Hill  mill xxviii,  228,  1041,  1 184 

W.  McDermott 2039 

stamps 228 

wear  of  amalgamating  pans 249 

rubber 770,   776 

Utah,  mill  at   926,  1041 

Europe,  hand  picking  in 486 

milling  in  1173 

mills  in 937,  1088 

Eustis,  Canada,  hammers  used 10 

mill  at 904 

Mining  Company  1888 

mill    xxv,  904 

W.  E.  C.  and  H.  M.  Howe,  magnetic  process  for 

nickel 833 

Evans  classifier 393,  476 

at  mills 1838,  1839,  1844,  1845 

Collom,   and   Woodbury   jigs,    capacities  com- 
pared       1448 

G.  H.,  hydraulicking 1006 

hydraulic  mining xix,  1173 

hydraulic  classifier,  details  of  in  mills     395 

ideas  on  jigging    2022 

jig   ..  517,524 

at  mills 1837,  1843,  1844,  1845 

size  of  sieve  and  plunger 529 

water  used  by,  compared  with  that  used  by 

Hancock  jig     1442 

round  tables  at  Mill  162 1846 

short  stroke  jig  at  Great  Falls 2021 

slime  tables  at  Milt  177    1893 

table    689 

used  in  mills 696 

Waddell  Chili  mills  at  Mill  160 1833 

W.  J.,  slope  of  launder  in  mill  of  Atlantic  Copper 

Mining  Company  873 

Evrard,  M.,  coal  jigs   641 

mechanical  discharge  for  jig  tailings 588 

Evrard's  coal  jig 642 

jig    643 

Examination  for  minerals   1162 

Excavating  expenses     1123 

Excavator,  the  Blaisdell 1600 

Excelsior  breaker    60 

Exhaust  fans  1099 

steam  for  heating   1098 

Expanded  metal  riffles    703,  722,  1007,  1008,  1012 

Expanding  cone  wash  trommel 334 

Expense  accounts   1122 

Experimental  plant  at  Mill  182 1911 

study     1120 

Experiments  on  film  sizing 707 

with  launders,  Blue's 1594 

Overstrom's 5921 

Explosives,  effect  of  on  rock    9 

36 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Extent  of  crushing  desired 303 

Extraction  at  Meyer  &  Charlton  mill,  South  Africa  . .    1647 
average,  percentage  made  in  various    districts, 

table  of   1612 

in  mills..  1618,   1622,  1626,  1639,   1648,  1649,  1657, 

1659,  1660,  1675,  1678,  1696,  1705,  1718,  1721, 

1723,  1724,  1726,  1730,  1745,  1767,  1771,   1780, 

1782,  1791,  1815,  1816,  1817,  1820,  1826,  1827, 

1830,  1834,  1849,  1856,  1865,  1870,  1871,  1881, 

1887,  1891,  1897,  1899,   1900,  1906,  1907,  1908, 

1909,  1912,    1914,    1916,   1920,  1922 

of  metals  and  minerals  by  Elmore  process    ....    1559 

percentage  of.     See  Individual  Mills  in  Chapter  XX. 

percentage  of     1115 

Extractions  and  costs 1939 

in  S.  Africa  increased  by  fine  grinding 2014 

western  Chihuahua 1665 

percentage  of  in  various  mills     1932 


Faber  du  Faure  furnaces  at  Mill  117     1674 

E.,  washing  of  graphite  for  lead  pencils 1176 

Face  of  rolls '. 83 

Fairbanks,  Morse  Company,  Elspass  mill 1323 

Nissen  stamps 1278 

False  bottoms    180 

for  stamps    180 

Falun,  Sweden,  mill  at     1136,  1177 

stamps  at   225 

Fan  for  air  blast 816 

shaped  apron  for  distributing 857 

Fans  at  Mill  186    1917,  1918 

for  dust    883 

Farbaky,  Stefan,  comparison  between  Wetherill  sep- 
arator and  wet  jigs  836,  2030 

Fargo  guide  for  gravity  stamps       154,  155 

Farrel-Bacon  breaker  at  Mill  175   1888,    1889 

-Blake  breaker  at  mills    .  1221,  1690,  1749,  1769,  1868 

life  of  wearing  parts  at  Mill  139   1221 

duplex  breaker,  table  of  sizes  of    21 

Foundry  and  Machine  Company 52,  59 

Blake  breaker 14,  21 

jaw  movements 34 

breakers 59 

cost  of  breaking  ore 1223 

information  on  Blake  breakers    1223 

roll  speeds    87 

Fastening  plates  to  table     735 

Father  de  Smet  gold  stamp  mill    1 108 


mill 

breaker  in 

Eureka  rubber  in    .... 
false  bottoms  in  mortar 

grizzlies  in    

mortar  liners   . . . 

mortars 

plates  in   

shoes  in 

stamp  screens  . . . 

stamps  in   

wear  of  shoes  and  dies  in   

Faults  and  features  of  rolls    

Faust,  H.,  on  jig  capacity 

jig,  slope  of  sieves  on    

width  of  sieve    

Fawcett,  W.,  testing  of  black  sands    

Fawns,  S.,  milling  at  Mt.  Bischof,  Tasmania 

Feather  River,  California,  dredging  on 

Federal  Lead  Company    

Mining  and  Smelting  Company 

Morning  mill . . 


1174 
...  57 
, . .  777 
. .  180 
..  385 
..  166 
164, 165 
..  787 
..  181 


224 

183 

1229 

602 

548 

591 

2048 

2037 

..1008,  1184 

1690 

1685 

1687 


shaking  screen  at  Mill  124   1694 

Feed  arrangements  on  slime  tables 688 

box  for  jigs      549 

Wilfley  table  673,  1468 

classified,  for  Wilfley  table   1473 

cone  for  trommels 358 

for  canvas  tables 700,  701 

classifiers 389,  442,  444 

Freid  dry-process  separator   1554 

Gil  pin  County  bumping  table 681 

gravity  stamps    207 

Huff  electrostatic  separators 1552,  1553 

MS  §52 

kieves 

riffle  tables      

rolls      

slime  tables     

stamps  


679 
1224 

720 
1224 


Feed  for  stamps,  quarter  inch 
trommels 
vanners 
and  slime  tables  compared 


2012 

352 

658 

691,692 

W7^f)per  Consistency  of 1404 

Wilfley  tables,  proper  consistency  of 1404 

free  and  choke  feed  for  rolls  compared    1229 

maximum  size  for  Wetherill  magnetic  separator  1525 

natural,  on  Wilfley  table 1471 

opening  in  mortars     ]  166 

openings  for  tube  mills 1287 

sized,  for  Wilfley  table    1473 

versus  classified  feed  for  Wilfley  table 1478 

size  of  feed  to  Ball-Norton  magnetic  separators.  .  1528 

in  gravity  stamps 207 

treated  by  De  Bavay  process 1562 

Ferraris  magnetic  separator 1525 

sole  for  classifiers    434 

spitzlutte    423 

suited  for  Wilfley  slimer    1505 

to  rolls 63 

Wilfley  table ;„....  674 

water  for  New  Standard  concentrator 1479 

Feeders.    See  Individual  Mills  in  Chapter  XX. 

Feeders 853,  1578 

at  Mill  125    1700 

bibliography  for 884 

Challenge  feeder 1578 

type     1580 

for  Argall  driers    1600 

clayey  ore 71 

gravity  stamps 199 

Huntington  mill 278 

movable  sieve  jigs    500 

rolls 71 

small  steam  stamps •   ...  137 

tube  mills 1287 

special.    F.  J.  Nagel 2016 

Woodbury  vanners 655 

Hoscur  ore   2032 

improved  swing  ore.     P.  J.  Johnson 2032 

in  the  mills 856 

Musterschutz 884 

Pepler  ore.    D.  J.  Pepler 2032 

Perfection  ore 1578,  1609 

Perfect  ore 1609 

push  feeder  at  Mill  113 1581 

shaking,  at  Mill  124    1691 

Simplex  ore  feeder 1578 

Feeding  affecting  capacity  of  jigs 601 

arrangements  of  stamps     128 

by  machine 1115 

gravity  stamps 207 

Huntington  mills 1314 

jigs 548 

magnetic  separator 802 

of  slime  tables    684,  689 

trommels 357 

ore  bins 843 

tube  mills 1288 

Feldspars,  decomposition  of.     A.  S.  Cushman  and 

P.  Hubbard 1418 

for  beds  on  coal  jigs 574 

Feldtmann,  W.,  definition  of  slimes    1398 

Fenner,  C.  M.,  on  gold  and  silver  in  amalgam  ....  763 

Ferguson,  H.  T.,  Dingey  mill 293 

Husband  pneumatic  stamps    143 

rolls  in  Cornwall Ill 

runs  in  Cornwall  for  tin    478 

tin  dressing  in  Cornwall    1182 

Ferrand,  P.,  amalgamating  pans  at  Ouro  Preto,  Bra 

zil...... . 291 

amalgamation  at  Ouro  Preto,  Brazil 1173 

California  versus  Brazilian  stamps  at  Ouro  Preto, 

Brazil    227 

gold  mill  at  Ouro  Preto,  Brazil 1182 

L'Or  a  Minas  Geraes xix 

riffle  sluice   727 

Ferraris  adjustable  eccentric  for  jigs 532 

ball  mill 1280,  1299,  1323 

at  Mill  137    1300 

capacities  of 1300 

table  of  sizes,  power,  weights,  etc 1300 

W.  R.  Ingalls  ". 2014 

belt  table    698 

classifier    400,  478,  1369 

E.,  calamine  plant  at  Monteponi 2040 

capacity  of  jigs 597 

concentration  at  Monteponi 1185 

dressing  zinc  ores  at  Monteponi 1185 


37 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Ferraris,  E.,  Ferraris  adjustable  eccentric 
belt  tables  . . 


..'. .     643 
....     729 

classifier 478 

magnetic  separator  at  Monteponi 836 

shaking  screen 386 

Harz  jigs  at  Monteponi  643 

magnetic  separation  at  Monteponi 2046 

mechanical  preparation  of  ore  in  Sardinia  . . .    1568 

riddle 385 

separation  at  Monteponi 1 185 

separator  at  Monteponi 836 

velocity  of  particles  falling  in  water    477 

hand  screen  1360 

intermediate  jig 539,  540,  584 

jig 522 

magnetic  separator 799,  1525 

at  mills 1525,  1741 

description  of  the    2027 

drum  type 1528 

method  of  removing  tailings 587 

shaking  screen 342,  386,  1347 

at  Mill  137    1347 

stay  box  for  jig  discharges    585 

tables    .' 1154,  1490 

at  mills  . . . . 1659,  1740,  1741,  1782,  1785,  1786,  1914 
tables    of    sizes,    capacities,    speeds,    power, 

weights  and  water  consumption 1490 

versus  jigs.     M.  Lenicque     2021 

waving  screen.     C.  W.  Wright 2019 

at  Mill  137    1739,  1740,  1741 

wet  ball  mill  at  Mill  137 1740 

Ferreira  mill,  details  of  stamps    221 

mine,  saving  by  hand  picking 487 

weight  of  ore  at    1160,  1191 

Ferro-aluminum  for  roll  shells 68 

shoes  and  dies     184 

Ferrous  sulphate  used  in  dressing  plates    757 

Fiber  asbestos   1080 

Fiberizer  at  Mill  186   1917 

Film  gauge    1159 

on  a  circular  slime  table,  thickness  of 695 

sizers 1464 

sizing,  results  of  tests 719 

tables 685,  1506 

Acme  table    1506 

bibliography  for 727 

buddies     704 

building  tables     704 

continuous  surface  tables 686 

depth  of  bed    1510 

intermittent  surface  tables    700 

investigation  of   707 

principle  of 644 

revolving  circular  convex  slime  tables 686 

surface  tables 685 

use  made  of,  in  mills 889 

thickness  of  on  amalgamated  plates    746 

on  slime  tables    695,    697 

Films  on  canvas  tables,  thickness  of 702 

Filter 879 

bins 1570 

at  Mill  171    1870 

boxes  for  jig  concentrates   586 

in  cyanide  plants 1 107 

press  at  mills 1628,  1630,  1641,  1642,  1678 

Filtering  mercury   786 

slimes    1160 

Filters  in  settling  tanks 458 

Final  conclusions  on  crushing 62 

hindered  settling  and  suction 631 

separators 480 

Financial  standing    1124 

Findley,  O.  P 1408 

mill  of  the  Cananea  Con.  Copper    Co.,    Mex- 
ico      2045 

Fine  concentrates,  definition  of    495 

objections  to 1053 

concentration  test 1165 

crushing  by  breakers    54 

department  at  Mill  152 1806 

gravity  stamps  Used  for     314 

mills 1004 

grains  investigation  on  rate  of  settling    473 

grinding.     A.  W.  Warwick   1340 

importance  of.     F.  C.  Brown 1323 

in  the  tube  mill.     A.  W.  Warwick    2015 

limit  of  screening    369 

sand  and  slime  concentrators 644,  700 

classification  of    1464 

kieves    726 


Fine  sand  and  slime  concentrators,  riffles 720 

concentrators,  Wilfley  table 1465 

slimes,  effect  of 892 

Fineness  of  bullion 749,  763,  785 

crushing  desired    303 

gold  and  silver  in  amalgam 762 

retort  residue 783 

Fines  for  miners   1 1 15 

in  product  from  Wilfley  roasting  furnace  sink 

in  water    1547 

Finest  size  jigged    606 

to  which  middlings  are  re-crushed  in  the  mills  1119 

Finger  bars  for  gravity  stamps 199 

lever-operated,  for  gravity  stamps 1273 

geared  rolls 77,  78 

Finish  angles  in  film  sizing  tests    715 

Finishing  machines 318 

Finland,  magnetic  separation  in 804 

Finlay,  J.  R.,  milling  in  the  Cceur  d'Alene  . . .  .2033,  2037 

mining  in  Cceur  d'Alene,  Idaho 1922 

on  costs 1927 

Fire  and  water  for  breaking  rock    9 

assay  of  gold  ore 1166 

tube  boilers    1090 

water  for 1106 

Fischer,  formula  for    speed  of  revolution    of  tube 

mills :    1337 

George  K.,  Robinson  riffle   729 

Herman,  operations  of  tube  and  ball  mills 1340 

Fisher's  steam  stamp 142 

Fitzgerald  shaking  screen-launders  at  Mill  142 1767 

Fixed  circular  convex  slime  tables    689 

Linkenbach  fixed  conical  table 689 

Roberts  table 691 

sieve  hand  jigs 519 

jigs 494,  507,  1444 

classifier  jigs 1447 

Hodge 1446 

Krupp  Harz  jig    1446 

New  Century 1444 

Richards'  pulsator  jig 1453 

Woodbury  jig 1447 

Flange,  Brownell 647 

for  amalgamating  pan  244 

Flanged  rolls   110 

at  Mill  130 1720 

Flash  point  of  oils 1098 

Flat  grains,  action  of 892 

on  slime  tables  . . 694 

in  middlings 1121 

River  district,  cost  of  producing  lead  in 1971 

Lead  Company,  disc  conveyor  at  Mill  1  of  ...    1583 

mill    xxvi,  920 

Missouri,  mill  at 917,  920,  1089 

site  for  mills 1085 

Fleming  dewatering  wheel 1609 

at  mills 1590,  1725 

J.  D.,  Fleming  dewatering  wheel 1590 

Flint  pebbles  for  grinding 267 

Flints  for  tube  mills 1288 

Floors  for  draining  concentrates 1112 

drying 880,  882 

hand  picking   485,  486 

mills 1088 

receiving  ore 842 

sampling 844 

steam  stamps 128 

weathering  830 

diamond  ground   1080 

slope  of 1089 

Florence,  Colo.,  rolls  at Ill 

Florida,  phosphate  mills  in 895 

Flotation  at  Golconda,  Nevada,  water.     W.  A.  Root  2046 

of  clay 1075 

process    1555 

at  Broken  Hills  2038 

acid 2035 

F.  H.  Jackson 2045 

Mill  130 1719,  1721 

data  on.     C.  Blomeke ! 2030 

De  Bavay 1555,  1562,  1568 

Delprat 1555,  1561,  1568 

at  Mill  129 1718 

description  of  different 2026 

economic  side  of  the.     W.  G.  Swart 2029 

Elmore  1555,  2029 

E.  Walker 1569 

vacuum-oil  process 1556 

history  of  the.     C.  Gopner 2028 

list  of  minerals  floated  by 1555 


38 


Pages  1199-1610,  Vol.  III. 


INDEX 


Pages  1611-2052,  Vol.  IV. 


Flotation  process,  Macquisten    1555 

Macquisten's  Coates  tubes 5638 

magnetic  separation  versus.     D.  Clark 1561 

Minerals  Separation  Company 1560 

or  Catermole  1555 

Potter   1555,  1561,  1568 

principle  of 1 199 

salt  cake.     Pittman    .              2028 


theory  of  the 

G.  Hoagland   

used  at  Broken  Hill,  acid    

Van  Meter  testing  apparatus 

vats  at  mills 

versus  magnetic  process  for  zinc  ores. 

ton 

"  Flouring''  of  mercury 

Flow  in  launders 


1555 

2027 

2037 

1992 

...1718,    1722 
E.  Laugh- 

2029 

751 

.     876 


of  sand  and  water  in  launders 

water  in  launders 

Flues  in  boilers 

Flume  for  water 

Fluorine,  atomic  weight  of 


. 1592,  1593,  1594,  1595 

884 

1091 

1105 

.  1188 


Fluorite,  specific  gravity  of 1189 

Fluorspar,  decrepitation  of 829 

separated  by  Hooper  air  jig 822 

Fluxes  for  melting 784 

F.  M.  Davis  Iron  Works  Company 72,  87,  194 

Folsom  dredge  of  140,000  cubic  yards  capacity    ....  2044 

Fonseca  on  impurities  in  amalgam   251 

Foot,  equivalents  of   1187 

A.  D.,  battery  screen 1270 

North  Star  mill 2045 

Mines  Company 1925 

Foote,  A.  E.,  glass  classifier 1146 

Foot-pounds,  equivalents  of    1188 

Force  required  on  rolls    74 

Forces,  table  of  value  of,  acting  at  different  angles  in 

rolls  94 

Foreign  mills,  sites  of 1086 

Forged-steel  roll  shells  at  Mill  141    1760,  1761,  1762 

Forms  of  frames  for  gravity  stamps    156 

launders    876 

riffles  721 

Formula  for  centrifugal  force 827 

in  trommels   374 

free  settling    471,   473 

magnetic  lines  of  force 793 

magnets 794 

path  of  particle  in  trommel 375 

settling  tanks  455 

Formulae,  Blue's  formulae  for  flow  of  sand  and  water 

in  launders 1594 

Forsgren  electromagnetic  separator 1538,  1815,  2038 

Forster  breaker 57,  60 

of  jaw  type 25 

plan  of    28 

table  of  wear,  in  Mill  67 28 

Fort  Scott  Foundry  &  Machine  Co.,  rolls 76 

Machine  Works,  rolls Ill 

Fortuna  mill,  amalgamated  plates  in 745,  762 

breakage  of  stamp  stems 188 

order  of  drop 215 

wear  of  shoes  and  dies  in   183 

weight  of  stamps  in   190 

Foss,  rohrmiihle 293 

Foster,  C.  Le  N 1173 

Ball  &  Leavitt  stamps 142 

belt  tables,  Cornish  frames,  buddies,  percus- 
sion tables,  kieves 727 

Blake,  Baxter,  Marsden,  Hall,  Lester,  Dodge 

breakers   : 56 

Carr  disintegrator 298 

Chase,  Conkling,  Edison,  Hoffman,  Kessler, 
Lovett-Finney,  Ball-Norton,  Buchanan, 
Friedrichssegen,  King's,  Wenstrom  mag 


netic  separators  

concentration  of  miscellaneous  materials. 


832 
1069 
109 


Cornish  rolls,  Krom  rolls 

Cyclone  pulverizer    , . .  298 

double-cone  classifiers    427 

edge  runners    295 


Gates  breaker 

gravity  stamps 

Griison  ball  mill 

hammers  and  breakers    

for  breaking 

hand  breaking  and  picking,  picking  tables 

Harz  jig,  Heberwasche 

Huntington  mill    

Husband  and  Patterson  stamps  


56 
223 

293 
56 
11 
492 
639 
297 
143 


Foster,  C.  Le  N.,  Jordan's  centrifugal  grinder 295 

Krom    jig,    Clarkson-Stanfield,    Pape-Henne- 

berg  machines 837 

limit  of  sizes  jigged 605,  606 

pointed  boxes,     cone     classifier,     Lockhart's 

classifier,  siphon  separator 476 

settling  tube 621 

Sturtevant  mill 298 

text-book,  ore  and  stone  mining    xix 

Vapart  disintegrator  299 

washing  pits,  pans,  and  trommels 334 

Foster-Coolidge  automatic  sampler 2032 

W.,  on  concentrating  tin  ore 288 

Foundation  for  arrastra 238 

Eavity  stamps 145 

nkenbach  slime  table 690 

mills 1088 

Wilfley  table 1465 

frame  for  amalgamating  pan    241 

Foundations  and  mortar  beds  for  stamps,  table  of  . .  118 

at  Grass  Valley,  mortar 2012 

for  Huntington  mills : 1313 

mills .  H25 


Nordberg  steam  stamp 
stamp  batteries    


1247 
2011 

mills,  concrete 2013 

steam  stamps 114 

tube  mills  1286 

in  stamp  mill,  masonry   2012 

mortar.    W.  H.  Washburn 2012 

stamp  mill.    A.  W.  Warwick 2044 

Foundry  for  mill 1088 

Four  mineral  separation  on  jigs 590 

Fowle,  J.  C.,  Buchanan  and  Wenstrom  separators  at 

Lake  Superior 833 

magnetic  plant  at  Michigamme  mine,  Lake  Su- 
perior    1175 

Fractional  selection  for  sampling ; 844 

Fracture  affecting  separation     889 

effect  of,  in  dressing  ores  3 

Fraenkel,  A .  476 


Frame,  Boss  cantilever  frame  for  gravity  stamps  . . . 

for  slime  table 

steam  stamps 

Wilfley  table  tilting  frame 

Frames    

Cornish 

for  amalgamated  plates. . . 
Frue  vanner  .... 


1464, 


39 


1272 
687 
118 
1467 
1507 
704 
733 
645 

gravity  stamps 152,  156 

jigs    507,522 

screens 176 

tin  ores 1083 

vanners  653 

Wilfley  tables 671 

new  Dimmick  patent  slime  table 1507 

of  iron  for  stamps 158 

rolls 63 

'    rag 1507 

Framing  of  mills 1088 

France,  mills  in 1179 

Francfort,  Italy,  mill  at 1182 

Francou  jig 519,   643 

Franklin  Furnace,  New  Jersey,  Edison  drier  at 1600 

mill  at     1060,  1181 

Wetherill  magnetic  separators  and  operating 

attendance  required  at 1525 

J.,  Huntington  mill,  Idaho  mine,  Alabama  ....    1174 
shaking  plates  and  blankets  at  the  Idaho  mine, 

Alabama 787 

Mining  Co 1181 

mill    xxvii,  993,  1017 

New  Jersey,  magnetic  separation  at  835 

Franklinite,  magnetic  separation  of 805,  807,  808 

separated  by  magnets 790 

specific  gravity  of  1189 

Fraser  and  Chalmers 16,  41,  79,  172,  280 

agitators  made  by 780 

amalgamating  pan.  .240,  243,  244,  245,  246,  247,  249 

classifier 416 

Corliss  engine    987,  1044,  1046 

deep  pocket  classifier 477 

details  of  cylinder  water  used,  and  capacity. .      126 

dial  cocks  for  gravity  stamps   199 

dies  made  by 245 

estimate  of  power  for  5-foot  pans    249 

gauges 1194 

geared  rolls 78 

Heberli  mill 257,   258 

Huntington  mill 280 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Fraser  and  Chalmers  on  amalgamators 780 

attaching  screens  to  trommels 356 

capacity  of  rolls  102 

classifying  vanner  feed 658 

design  of  cams 196 

mortar  bolts 150 

power  for  jigs    603 

stamps 204 

steam  stamps 131 

punched  screens    170 

screen  gauge 173 

shoe  shanks   181 

stamp  bosses    187 

clearance 195 

stems 187 

tappets    189 

thickness  of  screen  plate  372 

vanner  adjustments 659 

vanners 655,  662,  663 

wearing  parts  of  breakers   48 

power  for  rolls 97 

settlers 779 

trommels 357 

rolls 76 

at  Mill  136 1737,    1738 

Mill  175  1890 

roll  speeds    87 

sample  grinder 257 

sand  wheel 1587 

settlers 777 

spindle  breaker  wearing  parts , 47 

stamp  frames 153 

standard  rolls 2010 

cam 197 

steam  stamp  ..114,   116,   118,   119,   120,   121,   122, 
123,  126,  127,  128,  131,  133 

two-stamp  mill 209 

weights  of  spider  and  driving  cone  made  by. .     247 
Prayer  centrifugal  water-lined  pump  at  Mill  159  . . .    1829 

Frecheville,  R.  J.,  Cornish  tin  dressing 1183 

Free  and  choke  feed  for  rolls,  comparison  of   1229 

crushing    98,   313 

milling  test 1166 

settling  affected  by  natural  properties  of  min- 
erals       464 

and  hindered  settling  denned 464 

classification  by 474 

classifiers,  tubular 1381 

concentration  by 475 

deep-pocket  classifiers    1376 

defined  464,  1421 

formula 471,  473 

general  principles    464 

investigated  by  tubular  classifier    469 

ratio  free  to  hindered  settling 1430 

ratios 469,  471,  1426 

of  quartz  and  galena   1426 

table  of  1426 

sorting  by 489 

tube  investigation  465 

use  made  of,  in  mills 889 

velocities 476 

of  mineral  particles 1421 

versus  hindered  settling 1431 

Freezing  of  stone,  effect  on  strength 301 

point  of  mercury 730 

Freiberg,  Bilharz  jig  at    503 

oblong  movable  sieve  power  jig  used  at 503 

classifier  at 413 

hand  picking  at 486,   492 

mill  at 1087,  1099,  1102,  1135 

bibliography  for 297 

Saxony,  mill  at    958,  1174,  1177,  1179,  1183 

screens  at 364,  365 

sieve  scale  at   367 

skimming  jigs  at  576 

Stein,  Bilharz  and  Luhrig  tables  at 670 

water  used  on  bumping  tables  at 670 

Freid  Engineering  Company,  gravity  dry-process  sep- 
arator       1553,  1554,  2027 

size  of  feed  for 1554 

Freight,  cost  of  1126 

French  Rand  Mining  Company  mill.    T.  Dupont . .   2039 

Frenier,  J.  H.,  &  Son,  spiral  sand  pump    870 

sand  pumps 1588 

at  mills..  1630,  1708,  1755,  1756,  1761,  1769,  1779, 
1811,  1812,  1830,  1886,  1886 

Friability  of  minerals,  affected  by  calcining    9 

separation  by 830 

under  a  blow 1611 


Friability,  use  made  of,  in  mills 891 

Friction    1Q97 

angle  in  trommels  374 

clutches  . . 1096,  1606 

for  gravity  stamps 198 

the  H.  W.  Caldwell  and  Son  Company  friction 

clutch    1606 

in  jigs   602 

launders    876 

roll  journals    95 

rolls,  how  reduced    96 

losses 1098 

of  breakers    54 

cams    194 

gravity  stamps 219 

process  of  concentration.     O.  Witt 2030 

ore  dressing   2028 

Friedeberg  mill 235 

Friedensville,  jigs  at 642 

movable  sieve  jig  at 506 

Pennsylvania,  mill  at 903,  1178 

Zinc  Co.,  mill xxv,  903 

Friedrich  Krupp  Grusonwerk 260 

amalgam  press 1518 

amalgamating  tables 1514 

box-traps 1516 

ball  mill    260 

breaker  jaws 23 

Erikssons'  electromagnetic  separator 1529 

Forsgren  magnetic  separator 1539 

Krupp  Harz  jig 1446 

high  speed  rolls 1244 

mill  for  five  mineral  separation   591 

picking  tables 1435 

spitzlutten 1382 

wash  trommel    1341 

Friedrichssegen,  calcining  furnace  at 1546 

classifiers  at  477,  479 

distributing  tanks  at 450 

Heberli  magnetic  separator 799 

magnetic  separator  at    799,  833,  834 

mines,  Sautter  magnet  at 798 

picking  at 481,  487 

roasting  for  magnetism  at 815 

sieve  scale  at   367 

Frisbee  Lucop  mill 234,  267 

mill,  bibliography  for 294 

Frisco  mill,  Utah,  Paddock  jigs  at 822 

Mining  Company   1737 

Utah,  mill  at    1015 

Paddock  jig  at 839 

Fritsch  rolls 2010 

Frobel's  grinding  mill    232 

mill,  bibliography  for  291 

Froding  separator 2028 

in  Sweden,  data  on 2030 

Froitzheim's  spring  stamp    143 

Frongoch  mine,  double  cone  classifier  at  427 

Frue  vanners.     See  also  Vanners. 

vanners  645, 1499 

at  mills..  1625,  1627,  1662,  1689,  1694,  1695,  1703, 

1704,  1711,  1712,  1755,  1844,   1865,  1868,  1870, 

1880,  1881,  1884,  1929,  1930 

capacity  of 662 

description  of 645 

for  testing 1153 

in  Cornwall.     R.  A.  Thomas 2022 

modification  of 651 

testing 1171 

vibrations  of 658 

water  used  in 659 

without  previous  classification,  use  of 2023 

Fuel.     See  also  Wood  and  Coal. 

burned  in  driers    880 

consumption  by  Wilfley  roasting  furnace     1548 

required  by  roasting  furnace  at  Mill  138 1747 

rotary  drier  at  Mill  186 1917 

Fuller  mines,  gasoline  engines  at ....    109 1 

Full  teeter  velocities  of  quartz  and  galena,  table  of. .    1430, 

1431 

Fulton,  C.  H.,  cyaniding  in  the  Black  Hills  2033 

the  history  of  the  Homestake  mills 2041 

Engineering  Works,  clean-up  barrel 264 

Iron  Works,  breaker  of  Blake  type 22 

distributor  at  Mill  126 1707 

mechanical  batea 683 

rolls  76 

Furman,  H.  van  F.,  amalgam    788 

amalgamated  plates    735 

amalgamating  pan   291 


40 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Furman,  H.  van  F.,  amalgamation  and  concentration 

for  gold  and  silver 

and  S.  R.  Krom,  pneumatic  concentration    . . 

arrastra 

Blake,  Dodge,  Comet,  Schranz  breakers    .... 

breakers    

Bryan  mill   . . . 
capacity  of  jigs    . 
clean-up  pan   . . 
Crawford  mill    . 

cyaniding    

Cyclops  mill 

edge  runners    

gold  amalgamation 
gravity  stamps  .... 
Griffin  roller  mill  . 
Huntington  mill  . .  . 


Jigs 

material  for  jig  screens 
Morning  mill,  Mv 


lullan,  Idaho,  and  Hecla  mill, 

Glendale,  Montana 1179 

Paddock  jig  at  Frisco,  Utah 839 

practical  assaying   xix 

Roger's  rolls 110 

sample  grinder 292 

spitzkasten,   Frazer  &  Chalmers   deep  pocket 
classifier,  cone  classifier,  made  by  Colorado 

Iron  Works,  Carkeek  classifier 477 

testing  of  gold  ores 2048 

Furnace  for  drying 880 

heating  for  decrepitation 829 

melting   784 

roasting  at  mills 1747,  1862 

for  magnetism    814,   815 

Furnaces,  roasting 1545 

Future  of  ore  dressing 1119 


Gaetzschmann,  M.  F.,  amalgamating  pans 290 

amalgamators 787 

arrastra 289 

Aufbereitung    xix 

Ball  and  Wilson  stamps    142 

ball  mills 293 

Bogardus  mill    292 

Carr  disintegrator 298 

classifiers 476 

cone  mill 292 

crushing  machines 315 

edge  runners 295 

fixed  and  movable  sieve  jigs 639 

general  milling 1173 

gravity  stamps 223 

grist  mill  or  buhrstone  mill   291 

hammers,  breakers,  roasting  for  friability 56 

for  breaking 11 

hand  picking  492 

Hughes  pneumatic  stamp   143 

Nicholas  pulverizer    292 

pneumatic  concentration   837 

riddles  and  trommels 384 

roll  speeds    87 

schleudermiihle   299 

sledging,  spalling,  and  cobbing  hammers  ....  56 

slime  tables,  bumping  tables,  buddies 727 

trough  washers  and  wash  trommels 334 

various  obsolete  breakers 56 

Whelpley  &  Storer  pulverizer    299 

Gagnon  ore,  sizing  test  on  jig  tailings    607 

Gahnite,  specific  gravity  of 1189 

Galena  and  quartz,  jig  tests  on 620 

used  for  film  sizing  tests   707 

blende  ore,  Missouri,  sizing  tests  on 303 

treated  at  Diepenlinchen 670 

crushed  by  rolls 62 

cost  of  hand  picking  of 488 

extraction  plant  at  Mill  130   1720 

free-settling  velocity 471 

hindered -settling  tests  on 612,  617 

in  dolomite,  crushed  in  Mill  25 47,  98 

in  Missouri,  treatment  of.    O.  M.  Bilharz   ....  2034 

Iron  Works,  Blake  breaker  at  Mill  148 1792 

Kansas,  mill  at  901,  902,  1179 

ore,  weight  of 1 190 

pulsipn  jig  test  on 624 

roasting  furnace 1548 

separation  from  quartz 720 

settling  velocity  of 466,  469 

specific  gravity  of  1189 


Galena-sphalerite  ores  at  Broken  Hill,  separation  of.  1611 

1173                with  limestone,  crushed  by  rolls 69 

838        Galland  coal  breaker 2009 

290  Gallium,  atomic  weight  of 1188 

58        Gallon H87 

58               equivalents  of 1 187 

295                of  water    1187 

597        Galvanic  couple  used  on  amalgamated  plates 752 

291  Galvanized  iron  classifiers 1144 

295        Gandy  belting  for  elevators 862 

1167                canvas  belts 1094 

294  elevator  belt  at  Mill  114   1663 

295  Gangue  minerals  in  mills.     See  Individual  Mills  in 
1179  Chapter  XX. 

225        Gantry  clam  shells  for  loading  concentrates  at  Mill 

297           167 1858 

297        Garde,  A.  G.,  New  Century  magnetic  separator    . .  1542 

642       Gardiner  breaker 57 

545        Garfield  Chili  mill    1305 

at  Mill  167 1305,  1858 

screen  analysis  of  product 1307 

Smelting  Company,  Silver  Lake  mill    1771 

Garland  wire-rope  disc  conveyor  at  Mill  124    1695 

Garnet  rock,  weathering  of 831 

separated  by  magnets 790 

specific  gravity  of   1 189 

treated  on  Hooper  air  jig    505,  824 

Garn,  M 297 

Gartrell,  H.  W.,  effect  of  varying  speed  on  percent. 

of  undersize  in  crushing 2017 

Gas  engines 1091 

power  plant  at  Mill  172 1874 

Gasoline  engines  109 1 

Gassaway,  A.  D.,  plates,  riffles,  and  sluice  plates  at 

the  Magalia  drift  mine 789 

Gate  and  dam  discharges,  center  discharges  582 

for  jigs    577 

height  of  dam    579 

gate :. . .  578 

on  jigs 553 

ratio  of  height  of  gate  to  size  of  feed   . . .  578 

side  discharge    580 

tail  discharges 581 

Gates 138,  139 

all  iron  frame  revolving  screen 1353 

ball  mill  1280, 1300,  2014,  2017 

table  of  sizes,  capacities,  power,  weights,  etc.  1301 

breakers    55-60 

action  of 39 

at  mills  . .  1635,  1661,  1706,  1710,  1713,  1716,  1727. 

1768,  1817,  1818,  1821,  1828,  1853,  1857 

compared  with  McCully    45 

description   36 

details  of 38 

on  "choke  crushing"   48 

with  short  head  and  concaves 1208 

at  Mill  165 1851 

canvas  plant 1017,  1184 

of  the  Kennedy  Mining  and  Milling  Com- 
pany mill   xxviii,  1037 

cast-iron  head  center  for  gyrating  breakers 1220 

classifier   1369 

economic  rolls   81 

feeder 136,  854 

for  rolls 71 

for  classifiers 406 

ore  bins 843 

G.  G 1369 

classifier   418 

end  shake  vanner   653 

patent  vanner  belt 650 

gunlock  manganese-steel    mantles  for  gyratory 

breakers    1220 

hydraulic  classifier    477 

Iron  Works,  beveled  rolls    71 

Blake  breaker    23 

breaker 23 

jaw  movements 

capacity  of  jigs    597 

comparative    tests    of    jaw    and    spindle 

breakers    53 

estimate  of  cost  of  crushing    51 

Lowry  National  breaker   45 

on  design  of  cams 196 

friction  in  rolls 97 

wearing  parts  of  breakers    48 

power  for  jigs    603 

rolls  ......    73 

roll  speeds    87 

springs 74 


41 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Gates  Iron  Works,  Tremain  steam  stamp 136 

vanner    651 

in  mercury  traps  773 

wells    768 

on  Tremain  stamp   139 

P.  W viii 

rolls 109,  111 

at  mills 1707,  1710 

rule  for  power  used  in  crushing 309 

tube  mill 1280,  1296 

vanner 658 

Gauges 223,  1097,  1174 

for  brass  and  iron  wire 1999 

screens 171,  172 

water  films 1159 

wire  and  plate  1194 

Gayet,  argentiferous  galena  at  Villefort,  France 1178 

Castelnau  belt  table 728 

Geared  rolls 75 

at  Mill  183 1913 

Gearing 1096 

for  gravity  stamps 198 

Gears  for  amalgamating  pans    248 

trommels 356 

sand  wheels   865 

Gebriider  Sulzer  centrifugal  pump  at  Mill  118     1678 

Geddes  &  Bertrand  mill,  sizing  test  on  crushed  ore       100 

Geissler's  sampler 2031,  2033 

Geldenhuis  Deep  mine,  saving  by  hand  picking  ....     487 

mill,  details  of  stamps   221 

Gem  mill 940,  941,  942 

of  the  Milwaukee  Mining  Company  xxvi 

separator,  Lockhart's  automatic 430 

General  considerations  about  breakers  and  breaking.       47 

of  jigs   522 

regarding  costs  of  producing  lead    1974 

construction  of  rolls   63 

expenses   1123 

ideas  on  milling 1035 

milling  ideas,  bibliography  for 1173 

practice  in  the  Witwatersrand,  South  Africa  . .    1Q43 

principles 1 

governing  costs 1940 

of  ore  dressing 1 199 

pulsion 1460 

suction 1461 

remarks  upon  jaw  breakers 33 

table  of  roll  data  from  the  mills 64 

Genesee-Vanderbilt  mill  xxv,  893 

Gentle  Annie  mill xxviii,  1035 

Geometrical  ratio  for  sieve  scale   367 

Georgetown,  Colorado,  Krom  jigs  at   838 

George  V.  Cresson  Company 23,  72 

Georgia  stamp  mill,  an  old  time.     W.  S.  Yates 2036 

gold  milling  in.    H.  V.  Croll 2043 

Germanium,  atomic  weight  of   1188 

German  mills.     C.  Blomeke 2034 

mills 1177 

arrangement  of   1 107 

cost  of  milling 1135 

labor  in 1102 

overflow  battery 229 

stamps 230 

sweeping  table 703 

tests  on  strength  of  stone 301 

Gernet,  A.  von,  definition  of  slimes 1398 

Gersdorffite,  specific  gjravity  of 1189 

Geyer,  R.,  concentrating  lead  and  silver  at  Silberau.   1177 

roll 70,111 

slime  settling  apparatus 477,  478 

settler    460 

G.  G.  Gates'  hydraulic  classifier  418 

Giant  rock  breaker    22 

rolls,  Edison's    105 

Gibbonsville,  Idaho,  mill  at    1028,  1181 

stamps  at   227 

Gibbsite,  specific  gravity  of 1189 

Gibs  for  stamp  tappets    188 

Gilchrist,  J.,  Carr  disintegrator 298 

Peter  S.,  test  of  American  Process  Company's  drier  1599 

Gillon,  A.,  Cyclone  pulverizer    299 

on  breakers    61 

Gilpin  County  bumping  table 680,  682 

with  screens  attached 342 

Colorado,  milling  system 1030 

mills  in 1180,  1181 

milling  in   1047 

mills,  acid  water    173 

screens  used  in    169 

mortars  of  wood  and  iron 164 


Gilpin  County  shoes  and  dies  183 

stamp  mill    152 

practice 215 

stamps 226 

in 229 

Girard  water  turbine   973 

Girders  for  Nordberg  steam  stamp 1247 

Giroux  Consolidated  Mines  Company    1864 


mill,  Ely,  Nevada.    W.  R.  Ingalls 

Gladolinium,  atomic  weight  of 1188 

Glasdir  mine,  Wales,  mill  at 1072,  1183 

oil  process  at 832 

Glass  classifier 611,  1144,  1146 

jig 623,627 

launder  linings  at  Mill  166 1856 

table  for  film  sizing  tests 707 

testing 1154 

Glendale,  jigs  at 642 

Montana,  mill  at 1179 

Glenn,  Wm.,  sampling 884 

Glidden,  J.  T.,  Woodbury  jig   2022 

Globe  battery  stem  guide   2012 

guides  for  stamps  155 

iron  stamp  guide » .  229 

Glucinum,  atomic  weight  of 1188 

Glycerine  for  respirators   1100 

Gmehling,  A.,  Lohnert's  ball  mill 293 

Lord  &  Banfield,  Wood  machines 839 

Gmelinite,  specific  gravity  of   1189 

Gneiss,  weight  of    1190 

Goddard,  S.  H 1179 

Edison's  concentrating  plant 834 

rolls  110 

Golconda,  Nevada,  Macquisten  flotation  process  at  1555, 

1565,  1611 

Gold,  action  of  gravity  stamps  on 314 

amalgam 730,  1512 

used  in  preparing  copper  plates 752 

amalgamated  plates  used  in  milling    178 

and  silver  in  amalgam,  proportions  of   762 

proportions  of,  caught  on  plates 763 

retained  by  amalgamated  plates 759 

apparatus  used  for  amalgamation   731 

assay  for  in  Mill  55  304 

Mill  68   303 

atomic  weight  of 1188 

Bluff  Mining  Company,  plant  of 1654 

Coins  Mines  Co 1133 

combination  mills 1046 

concentration  of  fine   .  N.  J.  Fleck 2036 

condition  of   1013 

cost  of  producing    1974 

dredges,  metal  riffles  used  on 722 

dredging 1179 

in  general 1009 

plant   1007 

tables  for    703 

fineness  in  bullion 785 

hydraulicking  and  dredging    1006 

in  amalgam   767 

sluices,  distribution  of 2044 

Snake  River,  Idaho,  recovery  of  fine.     R.  N. 

Bell ! 2046 

strained  mercury 781 

tailings,  a  trap  to  save  coarse.     P  J.  Johnson  .  2024 

King  amalgamator 777,  1033 

mill,  Gladstone,  Colorado.    G.  P.  Scholl  ....  2042 

left  in  retorted  mercury 783 

loss  of 786 

by  use  of  cyanide.    B.  C.  Wilson 2024 

milling.    W.  R.  Ingalls 2040 

books  on v 

cost  of 1131,  1132 

details  on  modern.    G.  P.  Scholl 2035 

in  Bendigo.    H.  C.  Bogdell 2034 

Mexico,  cheap.    H.  L.  Collins 2033 

1908.    A.  James     2048 

notes  on  modern 2045,  2047 

small  steam  stamps  used  for 136 

mill  test 1166 

mill  with  gravity  stamp  and  canvas  table 1038 

plates  and  no  vanners    1017 

mills,  design  and  equipment  of.     G.  A.  Denny.  1261 

size  of  grizzly  used  in 340 

using  plates,  vanners,  and  canvas  or  blanket 

tables 1029 

with  gravity  stamps 1013 

no  amalgamated  plates 1014 

plates  and  vanners    1018 

miners'  pan   1152 


42 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Gold  obtained  on  canvas  tables    * 701 

ores  crushed  by  arrastra 238 

Bryan  mill   272 

rolls  62 

steam  stamps 135 

Gunnison,  products  of  stamping    139 

improvements  in  the  mechanical  treatment  of. 

W.  J.  Adams 2045 

mills  for    . .  1013,  1014,  1017,  1018,  1029,  1038,  1046 

process  of  separating  by  clean-up  pan    250 

proportion  of  gold  and  silver  on  successive' 

plates 763 

in  daily  and  hard  amalgam 762 

screening  test  on,  at  Mammoth 284 

testing 1167 

percentages  recovered  in  different  parts  of  the 

mill    . 749 

Prince  mill  1768 

Animas  Forks,  Colorado.     G.  P.  Scholl  and 

R.  L.  Herrick    2042 

Silverton,  Colorado.    H.  J.  Barm 2043 

mine  and  mill,  Colorado.     G.   P.   Scholl  and 

R.  L.  Herrick    1924 

quartz  mills,  distribution  of  machines  in   231 

ratio  of,  to  silver  in  plate  amalgam 764 

recovered  by  mercury  traps 771 

from  ashes   177 

waste 482,  702,  784 

on  cocoa  matting 702 

cradle 723 

plates 749 

riffles  in  Mill  56    725 

retained  by  copper  plates    765 

plates 762 

saved  on  Wilfley  tables  in  western  Chihuahua   .  1665 
saving   fine,   on   Snake   River,    Idaho.     W.   H. 

Washburn 2044 

separation  from  quartz  by  amalgamated  copper 

plate    4 

specific  gravity  of  native   1189 

pure 1189 

stamping 224 

advantage  of  using  mercury  in 208 

stamp  mills 1101,  1103 

clean-up  barrel  in   264 

suggestions  for  saving  flour.     R.  P.  Hall 2024 

treated  on  outside  amalgamated  plates 733 

value  of  recovered  by  sweating 759 

Golden  concentrating  plant,  plain  transverse  troughs 

or  riffles  in 772 

mill    1183 

Gate  table    681 

Star  mill,  mercury  trap  in    772 

mortar 165 

order  of  drop 215 

screens  in  175 

stamp  clean-up    201 

Goldfield    Consolidated    Mines    Company.     Combi- 
nation mill  of 1626 

Goldrinnen 702 

Goodale,  C.  W viii,  100 

Anaconda  classifier 396 

Chili  mill    269 

cleaning  base  amalgam 251 

concentration  at  Butte 1176,  2035 

of  Butte  ores   2042 

cost  of  concentration  at  Butte    2048 

crushing  by  rolls 104 

steam  stamps 134 

milling 1130 

Huntington  mill 278 

versus  rolls  297 

jig  tailings  at  Butte 640 

ore  dressing  at  Butte   1419 

power  consumed  in  crushing 313 

rolls  and  Huntington  mills    110 

silver  mill  at  Black  Pine,  Montana 1175 

sizing  test  of  Butte  crushed  ore 100 

jig  tailings    607 

showing  losses  from  hydraulic  classifiers  476 

steam  stamps  versus  rolls    142 

vanners  and  slime  tables  728 

variation  of  power  with  hardness  of  rock 316 

water  consumption  at  Butte 1420,  1997 

Goodwin,  E.  G.,  field  of  electrostatic  separators 1553 

Goose  neck  discharge  of  jig  hutches 504 

spigot 433 

for  classifiers    388 

Gordon,  H.  A.,  modern  stamps 225 

Goslich,  Griffin  roller  mill 279 


43 


Gothite,  specific  gravity  of   1189 

Gottesga.be  mill 1 177 

jigs  at 597,  641 

stroke  of  jigs  in 594 

Gould  centrifugal  pump  at  Mill  139  .  1757 

Mill  175 ; ;  :  isoo 

Goupilliere,  Haton  de  la,  angle  of  friction 1244 

blast  machines  and  Kronvjig 837 

Carr  disintegrator  298 

Cours  d'exploitation  des  mines xix 

crushing    315 

gravity  stamps 223 

grizzlies  and  trommels,  Briart  bar  screen 384 

hammers  and  breakers    56 

for  breaking H 

hand  picking   492 

jaw  breaker   56 

movable  and  fixed  sieve  jigs 639 

rolls  109 

schemes  of  dressing      1173 

siphon  separator,  Dor   and  Buttgenbach   hy- 
draulic classifiers 476 

spalling  and  cobbing  hammers     56 

Vapart  disintegrator  299 

Gouverneur  rotary  rock  breaker  for  talc 2009 

Gouyard,  G.  M.,  magnetic  concentration 834 

on  roasting  and  magnetism 815 

Cover  mill,  amalgamated  plates  in. .  746 

chuck  block 178 

cost  for  water  used  in    206 

plates  in   742 

screens  in 175 

water  trough  in 746 

Gowan's  amalgamator 789 

Grab  sample    845 

Grade  of  sluices    723 

Graded  crushing  and  separation   5 

by  rolls 103 

sizing  and  jigging 1120 

Grading  analysis,  discussion  of.     H.  S.  Denny 2048 

Graeter,  A.  E.,  dredge 1013 

Grain,  equivalents  of 1187 

Grains,  measurement  of 1138 

Gram,  equivalents  of 1187 

Granberry,  J.  H.,  magnetite  deposits  at  Mineville, 

N.  Y 1568 

Granby  Consolidated,  cost  of  producing  copper  at    .  1957 

hand  jig    xxv 

mill    893 

Mining  &  Smelting  Co.,  mill xxv,  908 

Missouri,  mill  at  908 

Grand  Victory  Mining  Co.,  mill xxvii,  1022 

Granite,  strength  of  301,  302,  303 

weight  of 1190 

Graphical  representation  of  free  settling 475 

hindered  settling 623 

sizing  tests   1139 

Graphite  and  molybdenite  dressing  by  oil  process. 

J.  F.  Latimer 2029 

angle  of  nip  required  to  crush   94 

crucible  for  melting    784 

dressing 1177,  1183,  1186 

in  Canada.    H.  P.  H.  Brumell    2025 

effect  on  mercury   751 

for  lubricating 1097 

stamp  cams    194 

milling 1074 

at  Calumet  Graphite  Co 2026 

paddle  in  melting   784 

separated  by  oil 831 

specific  gravity  of  1 189 

treated  on  Hooper  air  jig    824 

used  in  retorts  781 

washing 1176 

Grapple  automatic  feeder.     C.  Blomeke    2031 

Grass  Valley,  amalgamator  at    776 

California,  cost  of  producing  gold  in 1977 

mill  at  . .  1018,  1019,  1020,  1021,  1175,  1176,  1180, 

1182,  1184 

Eureka  rubber  used  at 777 

mercury  trap 774 

plates  at 787,  788 

riffles  771 

shoes  and  dies  at 183 

stamps  at 224,  226,  228 

Gratings  for  jig  screens  545 

Graupner  centrifugal  roller  mill 2016 

Gravel  mill 1017 

mining  in  Alaska,  cost  of.     C.  W.  Purington. . .  2037 

moved  by  water 878 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Gravel  screens 339 

stamp  mill  for  cement   2012 

washing 1006 

Graves,  F.  L.,  dredge    1013 

Gravity  muller,  Stanwood 1285 

-screen  at  Mill  138 1746 

specific,  effect  of 3 

stamps 144,  1246 

adjustments  of 206 

advantages  of  for  fine  crushing    314 

analysis  of  Morison's  curves  of  the  velocity  of  215 

area  of  discharge 209 

belt  tightener  198 

bibliography 223 

blankets  and  rubber  sheets  for  mortar  blocks  148 

blow,  efficiency  of 219 

Boss  cam  key  for    1273 

cantilever  frame  for   1272 

head  for    1271 

latch  finger 1273 

or  head  185 

wedge-grip  tappet  for 1272 

buckstaves    154 

California  versus  Colorado  practice 215 

cam  shaft 190 

cams    191 

for   1272 

Canda  cams  for 1273 

chuck  blocks    177 

clean-up   201 

clearance 195,  196 

clutches 198 

collars  and  bearings 190 

comparative  work  of  stamps  and  Huntington 

mills 1262 

compared  with  Huntington  mill 278 

compensating  weights  for 1645,  1651 

cost  of  crushing    205 

Crocker's  patent   229 

cross  sills    153 

details 223,  224,  225 

of  screens 169,  170 

dies    179 

disadvantages  of   222 

driving  mechanism 197 

economic  range  of 1276 

effect  of  variation  in  ore    207 

efficiency  of,  compared  with  steam    134 

false  bottoms 180 

feeders 199 

finger  bar,  cam  sticks,  and  crab 199 

Foote  screen  for    1270 

foundation   145 

frames 152 

gauges  for  screens 172 

gearing    198 

gibs  and  keys  for  tappets    188 

Gilpin  County 152 

guide  blocks  for 1267 

timbers   155 

guides 154,  155 

Harvey's  patent 227 

heavy  stamps  at  Mill  107   1645 

height  of  discharge 212 

drop 200 

Hope's  patent    227 

Rowland's  patent   225 

Huntington  patent    227 

in  South  African  practice    1643 

iron  stamp  frames 158 

Krupp  cam  shaft  for    1272 

life  of  shoes  and  dies 184, 185, 1277 

limits  of  drop 216 

lip  apron 178 

location  of  main  shaft    197 

Luckling's  mortar 227 

made  by  the  Denver  Engineering  Works  Com- 
pany     ; 1278 

maintaining  height  of  drop  in 200 

materials  for  wearing  parts  of 1277 

mercury  required 208 


setting  up  .  .  . 

200 

mortar  blocks 

145 

bolts    

.  .  148,  150 

covers    

167 
165 

feed  opening  . 

166 

linings  

166 

Gravity  stamps,  mouth  or  feed  openings  in  166 

mud  sills 152 

Newton  mortar   163 

Nissen  stamp 1263 

North  Star  mill 149 

mortar 161,  162 

number  and  height  of  drop 215- 

used 231 

Oldham  mortar 162 

old  wooden  type   225- 

order  of  drop  for  214,  1274 

overflow  battery 214 

Pachuca    1272 

parts  of 181 

placing  screen  in 170 

platforms    156 

posts    153 

power     204,  1274 

principle  and  purpose  of 113,  1262 

principles  of  action 144 

proportions  between  weights  of  parts 189,  1272 

pulley  for  belt  transmission 197 

pulp,  weight  of   1191 

putting  on  new  shoes 200 

ratio  of  power  required  to  overcome  gravity  . .  205 

right  and  left  hand  cams 195 

round  and  slotted  hole  screens 169 

running  of    206 

screen  area 209 

frames 176 

openings 167 

screens 167 

designation  of    172 

material  and  cost    173 

sectional  guides  for 1268 

mortar 163,  164 

setting  up 200 

shield  and  splash  board 177 

shoe 181 

and  dies,  size,  life,  cost,  etc 182,  183,  184 

fastened  to  head   186 

single  and  double  discharge  mortars 167 

size  of  feed 207 

screen  holes   210 

sizing  tests   210 

sockets  in  bosses  187 

South  African  practice 221 

splash  boards  in    177 

•versus  swash 218 

stamp  stem 187 

staves  for  shoe  shanks 186* 

stay  battery    214 

stem 187 

table  of  weights  of  parts   190 

tappets    188 

triple  discharge  two-stamp  mills 209 

types  of  frames   156 

used  in  California     231 

velocity  cards 216> 

•versus  rolls  and  grinders    222 


steam  stamps 

Walker's  patent 

water  pipes 

required    

wear  of  shoes  and  dies 

weight  and  blow  of 

drop,  capacity,  etc 

power,  etc 

of  mortars 


134 
227 
198 
221 
182 
218 
221 
219 
164 
170 


wire  screens 

stamp  mills,  arrangement  of 1108 

Gray  copper  and  barite  separated  by  decrepitation  .  829 

J.  W.,  New  Zealand  gold  dredges 1184 

rock  ore,  sizing  test  on  jig  tailings 607 

Grease,  effect  on  mercury  751 

Greased  plate 1611 

used  made  of,  in  mills  890 


surface  action 

for  diamonds . . . 

tables  at  Mill  188 

for  diamonds . . . 

Greases 

Greasiness  of  minerals 


4 
839 
1921 
831 
1097 
4 


mortars 160,  161,  1263 


Greasy  notation 1121,  1611 

use  made  of,  in  mills 890 

Great  Boulder  Perseverance  mine 1635 

plant.     R.  Allen   1925 

Falls,  Montana,  mill  at 974 

Fingall  mine,  stamp  milling  at  the.    G.  E.  Brown  2040 

Salt  Lake  water,  weight  of 1188 


44 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Greece,  ancient  milling  in.    L.  De  Launay 2033 

Greene  Cananea,  Mexico,  concentration  at.     R.  B. 

Brinsmade    2042 

Consolidated   Copper   Company,   copper   hand- 
book      .... ......       1925 

mill,    Cananea,   Mexico.     D.   E.   Wood- 
bridge   2038 

Greensburg,  Pennsylvania,  coal  washing  at 1178 

Greenside  mill,  Potterdale.     W.  H.  Borlase    2039 

Green's  movable  sieve  jig 639 

Greenstone,  weight  of    1190 

Greenway,  T.  T.,  May  and  Hancock  jigs  at  Broken 

Hill 643 

Green  well's  conveying  grate  and  picking  table 385 

Greenwood,  California 1021 

Gregory  Bobtail  mill,  acid  water 173 

T.,  Ferraris  hydraulic  classifier    479 

Grey,  jig  at  Karwin  642 

Griffin  centrifugal  stamp  mill     234,  268 

mills 2016 

at  Mill  105 1636 

capacity  of 1636 

power  required  for   1636 

in  Australia    2013 

life  of  wearing  parts  in  Mill  105   1636 

motion  of  the  roller.    H.  A.  Siordet  2017 

number  used    231 

•versus  buhrstone  mills    297 

stamps 284 

pulverizer 236 

bibliography  for 299 

roller  mill  235,  282,  1032 

bibliography  for 297 

Griffith's  rock  breaker 59 

Grill  four-compartment  direct  heat  drier 1596 

Grimsley,  C.  P.,  gold  dredging    1182 

Grinders,  Braun  sample  grinder 1284 

capacity  of.     E.  Rusager 2017 

classification  of   1279 

comparison  of  stamps,  tube  mills,  and  pans  as 

fine 2015 

details  of 232 

in  the  stamp  mill    2016 

McKenna  laboratory  ore  grinder 1285 

Nevada  sample   1284 

purpose  of     1279 

sample 256,  1284 

Sturtevant  sample 1284 

versus  gravity  stamps 222 

Grinding  action  of  centrifugal  pumps 870 

amalgam 780 

discussion  of  fine.     W.  A.  Caldecott 2014 

fine.    A.  W.  Warwick 1340 

in  amalgamating  pans   247 

at  Mill  105 1638 

machinery 1323,  1628 

machines  compared  with  pressure    313 

pans r 1279 

at  Mill  130 1720 

Australian  practice 1283 

Colorado  Iron  Works  continuous  pan    1282 

continuous    1282 

sizing  tests  of  pulp  from 1284 

wear  of  shoes  and  dies 1284 

•versus  tube  mills.     R.  Clark 2014 

Grip  for  stamps 200 

Grist  mill 232,  252 

bibliography  for 291 

Grizzlies 336,  384 

and  riddles,  vibrating 1346 

at  Mill  170 1866 

mills   ..1660,  1661,  1737,  1759,  1792,  1805,  1821, 
1828,  1831,  1853,  1860,  1888,  1892,  1909,  1913 
Denver  Engineering  Works    Company's    revolv- 
ing    1353 

for  dredges 1012 

Karlik  oscillating 385,  386 

life  of e 340 

picking  on    491 

purpose  of    340 

shaking,  at  Mill  124 1690 

vibrating 345 

Grizzly  bars,  forms  of   337 

Groke's  ball  mill 293 

Gromier,  G.. 58,  492,  834,  1178 

hand    picking  spathic    iron    ore    at    Allevard, 

France 492 

on  roasting  for  friability    58 

roasting  iron  ore  at  Allevard,  France   58 

spathic  iron  ore  at  Allevard,  France   1178 


45 


Grondal  ball  mill  for  iron  ores.    G.  Grondal 2016 

•versus  Heberli  mill 2013 

G.,  Grondal  magnetic  separators 1537 

magnetic  separators  at  Mill  59 1828,  1829 

Nos.  2,  3,  4,  and  5 1537 

process  for  iron  ore  treatment    2029 

in  Norway.     H.  V.  Hansell    2039 

iron  separation  by  the.     P.  McBennie 1568 

separation  of  iron  ores  by 2026 

Grooves  for  wire  rope  1095 

riffle,  of  Card  concentrators,  shape  of 1483 

Groppel  concentrator.     C.  Blomeke 2023 

Gross,  John,  cyanide  practice  in  S.  Dakota    1419 

Golden  concentrating  plant,  Colorado 1183 

Grothe,  A.,  gold  dredging  in  the  United  States 1183 

Grouping  of  machines 891 

Gruson  ball  mill , 233,  260,  1182 

bibliography  for 293 

table  of  details  of  261 

Guanajuato  Reduction  and    Mines  Company  mill 

C.  W.  Van  Law    2038 

T.  A.  Rickard 2045 

Guanaxuato,  arrastra  at    238  290 

Chili  mill  at 269,  295 

Guard  in  concentration 1123 

Guarding  work  of  machines  1111 

Guess,  H.  A.,  laboratory  amalgamator,  versus  actual 

milling H78 

Guide  blocks  for  gravity  stamps    1267 

boltless  stamp    2012 

rollers  for  belt  conveyors 860 

timbers  for  gravity  stamps    155 

Guides  for  gravity  stamps     154,  155 

sectional 1268 

types  of 155 

stamp  stems,  iron 2012 

steam  stamps 128 

materials  of     155,  156 

stamp,  material,  life,  lubrication 156 

Guiding  the  belt  on  Frue  vanners 645 

Gun-metal  screens  on  batteries  at  Mill  185 1915 

Gunnison  ore  crushed  in  Tremain  stamp 139 

Guston,  Colorado,  mill  at  893 

rock  house   485 

Gute  Hoffnung  mill    1102,  1136 

Gutta  Percha  Rubber  and  Manufacturing  Company, 

Spadone  concentrator  belt 1503 

Gypsum,  crushing  of 2017 

milling  in  Kansas.    W.  R.  Crane 2027 

specific  gravity  of  1 189 

treatment  in  Montana.     J.  P.  Rowe 2028 

Gyrating  amalgamated  plates 741 

breakers,  McCully    44 

motion  on  mechanical  batea 683 

or  spindle  breakers 1206 

screens 342 

for  coal  2019 

vanners  657 

Gyratory  breakers 36 

Austin 1210 

C.  L.  Hathaway   1215 

Gates'  cast-iron  head  center  for 1220 

gunlock  manganese  steel  mantles  for    1220 

style  "  K"  1207 

with  short -head  and  concaves 1208 

Hadfield  breakers  at  Mill  130    1719 

Kennedy 1213 

Krupp 1215 

McCully 1210 

at  Mill  139.     Life  of  wearing  parts 1222 

range  of  adjustment  of 1218 

size  of  crushed  product : . . .  1218 

mill,  Hathaway 1310 


H 

Habermann,  J.,  Brink  and  Hubner  disintegrator  . . .  298 

conical  roll  shells  at  Przibram Ill 

Dingey  mill 292,  293 

double  rolls  at  Przibram Ill 

fine  crushing  at  Przibram  1185 

fine  jigs  and  Salzburg  tables 641 

graded  crushing 1177 

gravity  stamps 224,  225 

Heberli  mill 292 

sieve  attachment 292 

iron  -versus  wooden  stamps 229 

jig  eccentrics  532 

Neuerberg  trommel 385 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Habermann,  J.,  ore  dressing  at  Raibl     1177 

pistons 641 

power  for  jigs 603 

proposed  concentration  mill  at  Przibram  ....  1177 

crushing  plant  at  Przibram 1176 

rolls  and  grinders   110 

at  Przibram 110 

Schwarzmann's   rolls,   Neuerberg's   rolls, 

for  crushing  coal 110 

for  graded  crushing    110 

in  a  lead  mill 110 

shells  in  two  sections   110 

versus  stamps 110 

Salzburg  table 728,  1185 

Schranz  mill 296 

separator  at  Przibram   836 

stamps  at  Przibram   229 

Stefan  mill  at  Przibram 1177 

trommels  and  jigs  at  the  Anna  mill,  Przibram  1177 

screens 385 

zinc  ores  at  Raibl 1185 

Habets,  A.,  Baum  jig  for  coal    642 

Hadfield,  R.  A.,  manganese  steel  for  jaw  and  cheek 

plates 57 

on  breakers 57,  59,  60 

ordinary  versus  manganese  steel  for  jaw  plates  60 

Blake  breaker  at  Mill  134 1733 

breaker 2009 

gyratory  breakers  at  Mill  130 1719 

rigid  rolls   2010 

rolls  at  Mill  134   1733 

Haile  gold  mine,  Chili,  mill  at 269,  295 

North  Carolina,  mill  at 1175 

plates  at  735,  787 

purifying  mercury  at    785 

Mining  Company   1621 

Halk  breaker 2009 

Hall  breaker 56,  57,  58 

R.  G.,  sizing  test  of  roll  product  99 

stamp  mill  in  Dahlonega  district 150 

Hallett,  S.  I viii 

Hallett's  hand  jig   1180 

on  extent  of  crushing  desired 304 

fine  crushing 1004 

form  of  launders     873 

power  used  for  crushing    309 

roll  speeds    88 

screens  in  concentrating 1114 

screen  versus  hydraulic  sizing 2020 

testing  jigs 1151 

table 675,  680,  1153,  1172,  2022 

three  mineral  separation  in  Mill  49 676 

Hallett's  hand  testing  jig 1180 

Hallidie's  corrugated  stamp  screens 226 

Halse,  E.,  amalgamated  plates 749,  755 

copper  plates  versus  silver  plates  for  amalga- 
mation    2024 

tests  on  loss  of  gold  with  plain  copper  plates  749, 

750 

Hamboic  classifier 2020 

Hammer  and  spring  mechanism  for  jigs    536 

drop  for  cleaning  mass  copper 12 

for  breaking 9 

cobbing 11,  480 

at  Mill  186 1917 

kieves    726 

scaling  plates  760 

sledging 10 

and  spalling 480 

spalling,  and  cobbing 56 

spalling 11 

and  cobbing 55 

steam  for  cleaning  copper  rock    12 

used  in  hand  picking 1435 

Hammerswasche  mill  1177 

jigs  at    597,   641 

stroke  of  jigs  in 594 

Hammond,  J.  H 286 

amalgamated  plates    735,  757 

cost  of  gold  milling 1134 

plating  copper  plates    755 

gold  stamp  milling  1178 

gravity  stamps 225,  229 

mercury  used  in  stamping 206 

milling  in  the  Transvaal   2033 

plates  and  traps 788 

riffles  721 

steam  stamp 166 

tables  for  supporting  plates 735 

breaker,  descriptions  of  the  new    2051 


46 


Hammond  cylinder  feeder  for  gravity  stamps    199 

dredge  at  Nome  Beach    2036 

Mfg.  Co.,  two-stamp  mill   209,  210 

roller  feeder 854 

Hancock,  H.  R.,  inventor  of  Hancock  jigs    1440 

jigs 504,  643,  1440,  1459,  2021 

at  mills. .  .  .1710,  1711,  1846,  1847,  1869,  1870,  1871 

Mine  La  Motte 2021 

for  dredges 2043 

punchings  as  bed  for   1459 

versus  Evans  jigs  at  Mill  162 1846 

water  used  by   compared   with  that  used   by 

Evans  jigs 1442 

Michigan,  mill  at    993,  998 

Hanctin's  mill   235 

bibliography  for 296 

Hand  breaker  for  testing 1 137 

breaking 56,  57 

advantages  of 12 

and  picking   492 

electromagnet 812 

feeding    223,  1115 

for  gravity  stamps 199 

jig  mills 892 

jigs 495,   519 

cost  of 1126 

for  testing 1150 

operation  of 497,  894 

skimming  of 497 

speed,  labor,  and  capacity 499 

pan    1152 

with  flange 1184 

picking.     See  also  Picking. 

picking   480,  492,  889,  1435,  1611,  2021 

advantages  of 480,  2021 

after  breaking  by  hammers 9 

an  equation  for 2021 

assisted  by  layers  on  belt  conveyor  at  Mill  145.    1781 
trommels  and  belt  conveyor  at  Mill  145. .   1781 

at  Clausthal 965 

Cripple  Creek,  Colo 2021 

Mill  176! 1891 

belt,  rope  and  plate  conveyors  for 489 

bibliography  for 492 

breaking  for 1435 

combined  with  screening  on  grizzlies 340 

comparison  of  picking  tables 491 

cost  of 487,  1438 

definition  of 480 

general  considerations  on 481 

in  mills 485 

use  made  of 889 

mine    481 

rock  house  482 

South  Africa 482,  2021 

S.  African  gold  mines.    A.  C.  Key 2021 

light  for 481 

limits  of 486 

mathematical  discussion  of 2021 

of  low-grade  ore  at  Leadville,  Colo 2021 

nugget  copper  in  Mine  44 54 

on  steam  stamps 129 

picking  chutes 489 

revolving  circular  tables 490 

shaking  tables 489 

speed  of  revolving  table  used  in 491 

stationary  tables 488 

tables  for 488 

tests 1163 

sampler  for  slime  table 1172 

sampling 844,  1570 

dipper  or  bucket  sample 845 

grab  sample 845 

moisture  samples 846 

pipe  sampler 845 

screens 1137 

sledges 10 

kinds  10 

sorting  tests  at  Mill  162 1842 

washers  for  placer  work 723 

washing 319 

Handles  for  hammers 11 

Handling  concentrates  at  Mill  173 1881 

Hanna,  M.  &  M.  Company  mill,  Capitol  City,  Colo- 
rado     2043 

Hansell,  N.  V.,  study  of  water  jigs 1463 

Hanson,  P.,  on  Tremain  stamp 139 

Hard  amalgam 750 

causes  of 761,  767 

on  plates 760 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Hard  amalgam,  proportions  of  gold  and  silver  in.  ...     762 

banks  in  jig  beds  ...........................      GOO 

Hardinge,  H.  W.,  Hardinge  conical  tube  mill  .  .  1280,  1296, 

2014,  2016 
conical  tube  mill,  capacity  ....................    1296 

power  required  by  ....................    1296 

Hardman,  J.  E  .........................  viii,  196,  1184 

absorption  of  amalgam  by  copper  plates  .....     765 

amalgamated  plates  ____  735,  748,  751,  752,  762,  765 


amalgamation 
blow  of  stamps 
breakers 


788 
220 
60 
false  bottoms  in  mortar  ...................      180 

Forster  breaker  ...........................       60 

foundation  for  gravity  stamps  ..............      145 

gravity  stamps  ...........................     225 

keeping  accounts  .........................    1178 

keys  for  stamp  cams  ......................      192 

mortars  .................................      165 

Oldham  and  Waverley  mills  ...............     228 

gold  stamp  mill  ........................    1  184 

plates  and  traps  in  the  Oldham  mill  ........      789 

stamp  stems  .............................      187 

Hardness  of  minerals  ....  ........................         2 

Hard  rock  phosphate  ............................     895 

Hardwick,  F.  W.,  Baum  jig  ......................     642 

Harmotome,  specific  gravity  of  ...................    1189 

Harney  Peak  tin  mines,  mill  .....................    1  180 

Harrietville  mill,  amalgamated  plates  in  .........  745,  748 

mortar  and  screens  .  ......................     226 

shoes  and  dies  at  ...........................     183 

Harrington  and  King,  clear  punched  slotted  screens      169 
material  for  screens    ......................     355 

screens,  table  of  dimensions   ...............     168 

stamp  screens  .........................  168,  169 

standard  plate  screens   .................  369,   370 

trommel  at  Mill  144  .  .....................   1771 

Harris  atmospheric  discharge  for  jigs  .............     583 

Corliss  engine    .............................     925 

Harron,  Rickard,  and  McCone,  the  new  improved 
Huntington  mill  ..............................    1313 

Harshaw  mill  ..................................    1174 

amalgamating  pans  at   ....................     290 

amalgam  in   .............................     783 

Boss  classifier  at  ..........................     478 

cone  classifier  at   .........................     425 

fuel  for  retorting  amalgam    ................     782 

grizzlies  in   ..............................     385 

high  stamp  capacity  ......................     207 

settlers  in  ...............................     787 

stamps  ..................................     224 

wear  of  amalgamating  pan  .................     249 

Hartman  mine,  power  jig  used  at  .................     506 

movable  sieve  jig  at  .......................     506 

Hartzell  Concentrating  Company  mill    ........  xxix,  1055 

Harvey's  stamp  ................................     227 

Harz,  bull  jigs  at  Mill  162  .......................    1843 

jigs  .......................................     507 

at  mills..  1692,  1693,  1694,  1701,  1702,  1703,  1725, 

1728,  1729,  1743,  1744,  1750,  1751,  1752,  1753, 

1767,  1772,  1773,  1774,  1775,  1829,  1837,  1843, 

1854,  1855,  1869,  1877,  1878,    1879,  1898,  1913 

•  construction  of  .....................  524,  525,  527 

iron  balls  for  bedding  .....................    1458 

Krupp  jig  ...............................    1446 

tailboard  in    .............................     551 

using  one  shaft  and  eccentric  for  plungers  .  .  .     530 
versus  Collom  jigs  ........................     515 

mills  in  the  .................................    1176 

round  rotating  cement  buddies  at  Mill  150.  .  1800,  1801 
slime  tables  in  .............................     697 

use  of  Linkenbach  pointed  boxes  in  ...........     441 

Haskell's  log  washer    .........................  .  .     327 

Hassell  Iron  Works  Company,  King's  bucking  board  1323 
Stanwood  gravity  muller  or  King's  bucking 
board  ...............................  1285 

Hatch  &  Chalmers  cost  of  hand  picking  ...........     487 

hand  picking  on  the  Rand  ...............     492 

F.  H.  and  J.  A.  Chalmers,   gold   mines   of  the 
Rand  ...................................      xix 

gold  stamp  mills  in  S.  Africa  .............    1173 

Hathaway,  C.  L.,  Hathaway  gyratory  mill  .  .  .  .1281,  1310, 

1323 
gyratory  breaker  .......................  1215,  1223 

Rock  Crusher  Company,  ....................    1223 

Hauer,  J.  von,  Blanton  cam  .....................     229 

Pape  Henneberg  Machine  ..................     838 

Hauraki    Peninsula,    New    Zealand,    cyanide    mills 

in    .......................................    1181 

Haurez,  P.,  Carr  disintegrator  for  coal  ............     298 


Haussner,  A.,  curves  for  lifting  cams   229 

Haverstraw  sandstone,  compressive  strength  of 300 

Hayden,  Ralph,  free-settling  velocities   1421 

Head  center,  Gates  cast-iron,  for  gyratory  breakers  .    1220 

for  gravity  stamps 185 

spindle  breakers    46,  47 

turbine  water  wheels    1090 

motion  of  Card  concentrator    1483 

New  Standard  concentrator 1478 

Overstrom  table    1485 

Wilfley  slimer 1504 

table    1466 

plunger  jig 518 

Heard,  John,  Jr 288 

concentrating  antimony  on  Paddock  jig 838 

Krom  jig 825 

and  Paddock  jigs   838 

Paddock  air  jig 823 

Sturtevant  mill 298 

Heat  and  quenching  for  breaking  rock 9 

effect  of  on  amalgamation 750,  766 

settling    474 

slimy  water 1414 

strength  of  stone  302 

to  change  porosity      4 

used  for  settling  fine  slimes 1147 

in  straining  amalgam  781 

Heating  for  decrepitation < 829 

friability   56 

in  magnets 795 

the  mill 1098 

to  change  magnetism 4 

form  magnetic  oxides  of  iron  813 

Heavy  solutions 1 174 

testing  by 1156,  1993 

Heberle,  E.,  Heberli  mill 292 

limit  of  screening    369 

ore  dressing  at  Falun,  Sweden 1177 

discharge  for  jigs 581 

stamps  at  Falun,  Sweden    '. . .     225 

Heberle  O,  magnetic  separation  at  Friedrichssegen . .     834 

Heberli  and  Grondal  mills  compared 2013 

magnetic  separator 799 

mills    141,  232,  257 

bibliography  for 292 

compared  with  Schranz  mills 292 

power  required  for   260 

tests  on  work  required  by 305 

versus  rolls  258 

system  of  trommels 364 

wet  magnetic  separator 810 

Heberwasche   421,  478,  520,  610 

used  at  Mechernich    477 

Hecla  mill  1179,  1892 

jigs  in   642 

Mining  Company 1688 

Heclon  breaker   2009 

Hector  mill 1184 

Mining  Company  mill xxvii,  1014 

Hedburg,  E.,  hand  jigs  and  Cooley  jigs  in  southwest 

Missouri 643 

jig    2022 

magnetic  separator.     R.  T.  Clegg 2030 

Height  of  chuck  blocks   177 

discharge  in  stamps    212 

of  steam  stamps    129 

stamps  at  mills..  1621,  1624,  1632,  1640,  1661, 
1668,  1677 

in  California 1619 

drop  of  stamps    200,   215 

in  mills  . . .  1618,  1620,  1621,  1624,  1626,  1632, 
1640,  1658,  1661,  1668,  1677,  1769,  1915 

gate  and  dam  in  jigs    578 

riffle  cleats  for  Wilfley  table 1468 

Finder  concentrator  ; 1481 

tailboard  affecting  jig  capacity 601 

on  jigs 550 

Heinstein's  ball  mill 294 

Helena  &  Frisco  mill 1178 

Gem,  Idaho,  tree  of  the.    W.  M.  Edwards  2034 

Mining  Company  943 

mill    xxvi,  942 

zinc  concentrator,  the  new    2047 

Helical  current  in  classifiers   401 

Helicoid  conveyor 1582 

Helium,  atomic  weight  of   1 188 

Hell  upon  Earth  mill xxv,  893 

Helmhacker,  R 225 

hand  picking  of  quicksilver  at  Idria,  Austria . . .     493 
quicksilver  concentrator  at  Idria,  Austria 1183 


47 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Hematite,     See  also  Iron. 

concentration  of  ............................    1054 

crushed  by  Minnesota  Iron  Company  .........       51 

method  of  washing  at  Iron  Mountain,  Missouri      334 
mill  for  ......................................  897 

ores,  magnetic  separation  of  .................     809 

weight  of  ................................    1190 

preparation  for  paint   .......................     839 

separated  by  magnets  ......................     790 

1  189 
500 
21 
1095 


specific  gravity  of 

treated  by  jig  at  Iron  Mountain,  Missouri  ... 
Vermillion,  action  of  Monarch  breaker  on  ... 
Hemp  ropes  ................................  . 

Hendrick  Manufacturing  Company's  screen  at  Mill 

157  .........................................  1820 

steel  plates  for  tower  screens  at  Mill  158.  ..  1822,  1824 

Hendrie  &  Bolthoff,  double-cone  classifier  ........  427 

portable  stamp  mill    ......................  226 

Mfg.  and  Supply  Company,  King  screen  ....  1360 

Hendryx  cyanide  method  at  Nelson,  British  Colum- 

bia .........................................  2035 

Hendy  and  Meyer,  rolls  .........................  76 

Challenge  feeder  used  in  Huntington  mill  ......  278 

feeder    ....................    .............  853 

concentrator  ...............................  683 

feeder    ....................................  136 

for  gravity  stamps  ........................  199 

rolls  ..................................  71 

gold  hand  pan  .............................  1184 

Machine  Works,  Blake  breaker  ..............  22 

mechanical  batea  .......................  683 

on  design  of  cams     .....................  196 

two-stamp  mill  ......................  209,  229 

Henninger's  limonite  washer  ..................  xxv,  895 

Henrich,  C.,  blende  dressing  at  Webb  City,  Missouri  1175 

Henry,  A.,  breakers   ............................  57 

capacity  of  jigs    .......  ;  ......  .  ...........  597 

dressing  lead  and  zinc  in  Belgium  and  the 

Rhenish  provinces  ......................  1176 

gravity  stamps  ...........................  224 

hand  breaking  and  jaw  breakers  in  Belgium  57 

Harz  eccentric  jigs  at  Przibram  ............  641 

jigging  in  Belgium    .......................  641 

labyrinths,  pointed  boxes,  Engis  trough  class- 
ifiers, Dor  classifier,  and  siphon  separator 

used  at  Mechernich   ....................  477 

magnetic  separation  at  Przibram  ...........  833 

ore  dressing  at  Przibram  ..................  1176 

Rittinger  spitzlutte  at  Przibram  ............  477 

table    .................................  728 

rolls  ....................................  110 

stroke  of  jigs     ...........................  594 

wash  trommel    ...........................  335 

Henry  Faust  jigs,  slope  of  sieves  in  ...............  548 

width  of  sieves  in  ....................  591 

Faust  mill  ...............................  xxv,  901 

Nourse  Gold  Mining  Co.,  sand  wheel    ........  865 

tailings  wheel  at    ...................  884 

Hensburg,  great  screening  tower  at  ...............  2018 

Hercules  mill,  Burke,  Idaho.     S.  Turner     .........  2045 

rock  breaker  of  Blake  type  ..................  22 

Bering,  R.  and  J.  C.  Trautwine,  Jr.,  formula  for  the 
uniform  flow  of  water    ......................  xix,  877 

launders    ..............................  885 

C.,  tables  of  equivalents    ................   xix,  1187 

Herrang,  Sweden,  Grdndal  magnetic  separators  at  .  1537 

Herreshoff  roasters  at  Mill  168    ..................  1862 

Hersam,  E.  A.,  power  required  for  crushing  .......  1334 

power  in  crushing  ........................  1340 

size  of  opening  in  screens   .................  2019 

sources  of  lost  power  in  crushing  ...........  1325 

theory  of  crushing  ........................  2018 

Hessite,  specific  gravity  of  .......................  1189 

Heusschen  furnace  for  decrepitation  .............  829,  839 

Hewitt's  amalgamator    ..........................  788 

Hexagonal  trommels  ............................  362 

at  Mill  183  .........  .  ....................  1913 

Hibernia  magnetic  concentrating  plant  ............  835 

mill  ...................................  1135,  1183 

magnetic  separation  at  ....................  803 

New  Jersey,  mill  at   ......  t_  .................  1058 

Hick  revolving  grizzly  bars   ......................  385 

Hicks,  J.,  slimes  in  dressing  tin  ..................  1183 

tin  ores  in  Cornwall  ......................  1180 

Hidden  Treasure  mill  ......................  xxviii,  1035 


acid  water  . . 

mortar 

plates  in   

High- power  magnetic  separators 
speed  machines 


173 

165 
788 
805 
1097 


High-speed  rolls,  advantage  of   88 

Humboldt 1241 

Krupp 1238 

versus  Bryan  mills    1309 

Hill,  R.  T.,  Mexican  placers    2036 

Hille,  F.,  Bilharz  spitzlutte 477 

concentrating  galena  and  zinc  blende  . .  .1178,  1181 

gravity  stamps 225 

Krupp  amalgamating  table  and  Laszlo  amal- 
gamator    788 

losses  in  gold  stamp  mills 1178 

material  for  jigs 643 

Himmelfahrt-Fund  mine,  classifier  at 413 

mill    ..936,  958,  1087,  1099,  1102,  1116,  1127,  1135 

1177,  1182 

sieve  scale  in  367 

Himmelfiirst-Fund  mill 1177 

mine,  air  concentrator  at 818 

dry  concentrator  at  837 

Hindered  settling 1460 

and  suction,  final  conclusions  on 631 

classifiers,  deep-pocket 1387 

shallow-pocket 1384 

defined    464,  1421 

full-tube  velocities  of  quartz  and  galena 1430 

general  principles    610 

in  kieves 727 

pan  concentrator 683 

on  jigs 494 

ratio,  theoretical  value  of 1427 

free  to  hindered  settling 1430 

ratios    617,  625 

results  of  tubular  classifier  tests  on 613 

tests    610,  1428 

in  pulsion  jig 623 

use  made  of,  in  mills 889 

versus  free  settling 1431 

washer 520 

Hinged  hammer  pulverizer,  Jeffrey   1321 

Williams  1322 

stone  breaker 2014 

History  of  hydraulic  classifiers   1337 

Hoagland,  M.,  Sons  Co.,  rolls   77 

breaker 57 

rolls  at  Mill  157    1820 

Hobson,  J.  B.,  and  E.  A.  Wiltsee,  arrastra  at  Smarts- 

ville  and  Mooney  Flat 290 

gravity  stamps 225 

Hochstedt  air  blast  apparatus 816,  839 

Hochstrate  air  blast  apparatus 838 

dust  apparatus  837 

Hochstrate  apparatus  at  Rheinpreussen  colliery.  839 

tubular  classifier  for  coal 479 

Hodge,  C.  J.,  Collom  jig 510 

disc  motion  for  jigs 536 

jigs 517,   522 

and  Cleaves  sand  pumps  at  Mill  182 1910,  1911 

classifier   476 

jigs 1440,  1446 

at  mills  . .  1896,  1898,  1902,  1903,  1904,  1905,  1909, 

1910,  1911 

differential  motion  for    1457 

Hodges,  A.  D.,  amalgamating  pans 291 

Comstock  lode 291 

hand  sampling 884 

Jr.,  impurities  in  amalgam 251 

silver  milling  on  Comstock  lode 1175 

Hoe  conveyors 1582 

at  Mill  141 1762 

for  skimming  jigs   576 

Hoffman 288 

magnetic  separator 832,  835 

mill    1706 

0 291 

cone  mill 292 

W.  H.,  concentration  at  the  Croton  mines 1175 

cost  of  milling 1135 

magnetic  concentration  at  the  Croton  iron 

mines 1180 

Sturtevant  mill 288 

at  Croton  iron  mines 298 

Hofman,  H.  0 1175 

Anaconda  Copper  Company 1922 

Blake  and  Gates  breakers  in  the  Black  Hills  57 

gravity  stamps  in  the  Black  Hills    224 

grizzlies  in  the  Black  Hills    385 

hand  sampling  and  various  samplers    884 

Homestake  and  Caledonia  mortars 228 

Lewis  and  Bartlett  bag  process   885 

metallurgy  of  lead xix 


48 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Hofman,  H.  O.,  mortars    164,  165 

mortar  linings    166 

plates  and  traps  in  the  Black  Hills   787 

roasting  a   blende-marcasite    concentrate   for 

magnetism    2025 

Hog  trough  classifier    390,  476,  1367 

Hoists   1608 

for  gravity  stamps 200 

Filling's  pneumatic 1608,  1610 

Holes,  arrangements  of  in  screens    168 

in  screens  relation  of  ;thickness  of  plates  and 

wires  to  diameters  of,  as  found  in  the  mills . . .  372 

size  of,  in  sieves      546 

Holibaugh,  J.  R.,  hand  jigs  in  Missouri    643 

zinc  ore  in  Missouri 1181 

Holloway,  G.  T.,  disadvantage  of  the  mesh  designa- 
tion     2019 

Holman  Brothers'  Ltd.  Acme  table 1506 

Holmes  &  Blanchard,  buhrstone  mill    252 

Holtoff,  H.  C viii 

Homberg,  Hochstedt  apparatus  at 816 

Home  Run  mill,  Prescott,  Arizona,  Nissen  stamps  at  1264 

Homestake  mill,  cam  shafts   190 

cyaniding  at.     F.  L.  Bosqui 1925 

dies  used  in   163 

dimensions  of  tappets  in   189 

fineness  of  amalgam 764 

guides  in 155 

history  of  the.     C.  H.  Fulton 2041 

life  of  cam  shafts  in 190 

shoes  and  dies 184 

mortar  mouth 166 

mortars 164,  165 

plates  in   : 789 

rate  of  crushing  in    165 

screen  frame 177 

screens  used  in     175 

shoes  in 181 

stamps 224 

tappets    188 

treatment  at  the.     C.  W.  Merrill 2044 

Mining  Company   1133 

mill    xxviii,  1025,  1181,  1639 

mortar 160,  228 

at  Mill  106 1640 

modern 1267 

ore,  metallurgy  of.     C.  W.  Merrill   1419 

slime  plant.     M.  Ehle,  Jr 1925 

stamp  compared  with  steam  stamp 136 

Hood,  O.  P.,  test  of  Nordberg  stamp  at  Mill  181. ..  1250 

Hoop  tighteners  for  trommels 355 

Hooper,  E.  H.,  suspension  of  solids  in  a  horizontal  cur- 
rent of  water 477 

air  jig   820 

Hooper's  vanning  jig   505 

Hoover,  C.  H.,  economy  and  speed  of  operating  mine  1948 

Hope  breaker 61 

Hope's  stamp 227 

Hopkins,  T.  C.,  washing  kaolin 1183 

Hoppe,  O.,  action  of  jigs 499 

jig  bed 641 

settling  in  water    1186 

suction  in  a  jig  bed    643 

tests  on  jigging   630 

water  separation   1 186 

Hopper  bottomed  classifiers    412,  413,  414,  415,  416 

shaped  shallow-pocket  classifiers 400 

unwaterer     476 

Hoppers  for  rolls 83 

Horel,  V.,  progress  in  concentration 2049 

Horizontal  log  washer    328 

mills 255 

plunger  for  jigs 517 

shafts  of  amalgamating  pans    248 

washers  for  clay    1076 

Horn  amalgamating  pan 291 

Horn  rotary  slime  concentrator,  the    1499 

Hornsilver  Mining  Co 1181 

mill xxvii,  1015 

Horn  spoon 1 153 

Horse-power.     See  Power  also  under  each  machine. 

equivalents  of 1188 

of  Blake  breakers 17,  21,  24 

Comet  breaker 41,  46 

Dodge  breaker 30 

Forster  breaker 28 

Gates  and  McCully  breakers   45 

breaker 38,  46 

McCully  breaker 44 

rolls  ..  64 


Horse-power,  rule  for  breakers  53 

steam  stamps 131 

Sturtevant  roll  jaw  breaker ,  33 

Hoscur  ore  feeder 2032 

Hot  air  heating 1099 

sand  for  sweating  plates    759 

water  for  sweating  plates 759 

Hotop,  oscillating  ram  for  rolls 1 12 

washing  of  clays   '/.'.    1135 

Houghton  County,  Michigan,  mill  in 994,   1000 

Housing  for  elevators,  etc 862,  1099 

rolls 83 

trommels '     353 

Howe,  H.  M '.'.'.'.'.'.'.'.'.'.'.'.'.'.     188 

and  W.   E.   C.  Eustis,   magnetic   process  for 

nickel    833 

Howell  J.  and  M.  B.  Jamieson,  Collom  jigs  at  Broken 

Hill 643 

concentrating    silver    ores    at    Broken 

Hill,  New  South  Wales 1182 

stamps    at    Broken    Hill,    New  South 

Wales 227 

steam    stamps    at    Broken    Hill,   New 

South  Wales     142 

Howell-White  roasting  furnace   1545 

furnaces  at  Mill  148 1792,  1793 

Howland  mill  No.  1 235 

No.  2 232 

bibliography  for 290 

patent  stamp  battery    229 

pulverizer  No.  1,  bibliography  for 297 

riffles  722 

rotary  stamp  mill    225 

Huanchaca  Mining  Co.,  size  of  stamp  feed 207 

Hubbard,  Prevost,  decomposition  of  the  feldspars  . . .    1400 
and  Cushman,  A.  S.,  decomposition  of  feld- 
spars     1418 

Hubner,  Bartsch  and  Linkenbach  tables 729 

testing  slimes  at  Tarnowitz 1186 

Huet  &  Geyler's  jig '. .  641,  643 

settling  cylinder 478 

Huff,  Charles  H.,  electrostatic  separation 1551 

electrostatic  separator 1551,  1611 

principle  of  action  of  1552 

sizes  treated  by 1552,  1553 

Hughes  Davipt,  electromagnet 812 

penumatic  stamp 143 

Huile  gold  mill.     A.  Lakes 2041 

Hull,  Florida,  mill  at  897 

Humboldt  coal  breaking  machine.    M.  J.  Julin    . . .   2050 

crushing  rolls 1244 

Engineering  Works  Company 1493 

ball  mill    1301 

Bartsch  rotary  percussion  table  1497 

belt  percussion  table 1496 

Blake  breakers 1205 

Dodge-type  breakers 1206 

high-speed  rolls  1241 

Humboldt  crushing  rolls   1244 

magnetic  separators    1530 

picking  table    1437 

sand  wheels 1586 

tables  at  Mill  150 1800,  1801 

high-speed  rolls.     C.  Blomeke 2016 

"Perfect  Table"   2023 

riffle  concentrator.     C.  Blomeke   2023 

Humphrey,  R.  K.,  roll  crushing 2010 

mill    .    1766 

Creede,  Colorado    2044 

new  rolls 2010 

quartz  mill  2015 

rolls  1234,  1244 

table  of  sizes,  power,  speeds,  weights,  etc.  . . .    1235 

Hundt's  settling  tub  478 

Hungarian  mercury  wells 770 

mill 787 

riffles  725,  770 

Hungary,  stamp  mills  in.    J.  Bauer 2034 

U-shaped  classifier 424 

Hunt,  R.,  arrastra 290 

Ball's  revolving  knife  buddle 334 

breakers 56 

British  mining xix 

buddle  jig 518 

buhrstone  mill   253 

Carr  disintegrator 298 

cost  of  crushing  by  rolls    104 

Cunnack's  pulverizer   293 

edge  runners 295 

English,  German,  and  French  types  of  rolls . .      109 


49 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Hunt,  R.,  general  milling  ideas 1 173 

gravity  stamps 223 

grist  mill  or  buhrstone  mill     291 

Harz,  Argalls,  Collom,  circular  slime  jigs    . . .      639 
Husband  and  Sholl  pneumatic  stamps,  Patter- 
son spring  stamp 143 

Jordan's  pulverizer  299 

Marsden  breakers 56 

Michell  and  Tregoning  pulverizer 294 

Nicholas  pulverizer 292 

pointed  boxes,  cone  classifier,  Hodge's  class- 
ifier         476 

Wilson's  small  stamp  142 

Huntington  amalgamating  pan 291 

centrifugal  roller  mill 235 

mills 110,  228,  276,  1182,  1311 

as  regrinding  machines    1332-1333 

at  Butte,  Montana   2014 

mills..  1625,  1668,  1684,  1686,  1687,  1689,  1694, 

1701,  1711,  1738,  1753,  1839,  1845,  1867,  1869, 

1870,  1871,  1897 

bibliography  for 296 

Boss,  M.  P 1281 

roller  mill  1313 

capacities  of 281 

with  various  screens 1314 

centrifugal  force  in 278 

comparative  work  of  stamps  and  Huntington 

mills 1262 

cost  of  crushing  by 281,  1318 

costs,   life  of,   wearing  parts   in  the.     C.  E. 

Parsons 2014 

die  rings  and  roller  shells    280 

dimensions  and  weights 280 

feeding    1314 

foundations  for    1313 

Fraser  and  Chalmers  figures  on 280 

Harron,  Rickard  &  McCone    1281 

improved 1311 

in  Australia.     A.  G.  Charleton    2014 

El  Oro,  cost  of  running 2014 

general    1313 

southern  Rhodesia.     C.  Parsons    1323 

life  of  screens 1317 

wearing  parts 1317 

new  improved    1313 

number  used    231 

Power  &  Mining  Machine  Co 1281 

purpose,  power  and  capacity    280 

quality  of  work  done  by    1317 

screens  for   281,  1314 

screen  sizing  test  of  feed  and  product  of  Hun- 
tington mill    1316 

Sherman 1281,  1313 

sizing  test  of  pulp  from   1317 

table  of  sizes,  power,  speeds,  and  weights  of 

improved 1312 

used  in  California     231 

Mill  21 413 

near  Tremnitz,  Hungary 282 

valuable  paper  on.     C.  E.  Parsons  2016 

versus  Bryan  mills    273 

stamps 228 

oscillating  stamp 227 

patent  stamp  mill 229 

theory  of  flotation  processes 1556 

Huntoon,  L.  D.,  separation  by  crushing  and  screen- 
ing      1566 

Hurdy  Gurdy  water  wheels  1023,  1089 

Hurst,  George  H.,  methods  of  washing   1173 

painters'  colors,  oils,  and  varnishes xx 

Hiirter,  C.  S  ,  wave  action  on  amalgamating  plates. .    1619 

Husband  and  Sholl  penumatic  stamp 143 

pneumatic  stamps 141,  1082 

Hutch,  discharges  into  the    586 

for  jigs,  slope  of   523 

product,  definition  of 495 

on  jigs,  defined  495 

Hutches  for  jigs 523 

Hutchins,  J.  P.,  dredging  in  Montana 2039 

the  Klondike   2038 

gold  dredging  in  1906    2038 

history  of  dredging 2037 

flutchinson,  W.  S viii 

Gates  canvas  plant 729 

plant  at  Grass  Valley 1184 

milling  in  Chihuahua,  Mexico   2038 

mining  in  western  Chihuahua 1923 

sieve  scales 1361 

standardization  of  laboratory  screens    1366 


Hutchinson,  W.  S.,  standardization  of  screens 2019 

Huxley,  E.  C.,  breakers 57 

Hoagland  breaker 57 

Hyams,  G.  M viii 

Hydraulic  classifier.     See  Classifiers. 

classifier    387 

Bilharz    475 

Dalton 398 

deep  double  trough 416 

pocket  409 

double  cone   426 

extent  of  classification 1433 

Ferraris 400 

Fraser  and  Chalmers 416 

G.  G.  Gates' 418 

hopper-shaped  shallow-pocket    400 

measures  of  a  four-spigot,  with  sorting  columns 

of  a  3-inch  pipe 403 

purpose  and  essential  qualities  of    389 

Richards'  shallow-pocket 401 

sizes  of  feed  to 389 

trough  or  shallow- pocket 389 

Yeatman 399 

discharge  for  steam  stamp  at  Mill  179 1897 

giants 55,  333 

for  phosphate 898 

Monitor 333 

gold  mining.     G.  H.  Evans    2041 

jigs,  compared  with  air  jigs    825 

mean  depth  in  launders 876 

methods,  discussion  of.     R.  H.  Grider   2026 

mining.     See  under  Placer. 

at  British  Guiana.     F.  W.  Luick 2033 

by  elevator.     C.  W.  Wright   2044 

cost  of.     W.  H.  Radford 2033 

in  British  Columbia 2033 

California  2037 

W.  H.  Radford 2033 

Colorado.    W.  E.  Thorne 2033 

K.  Thomas 2046 

riffles  for    721,  770 

mortar  discharge  at  Mill  182 1909,  1912 

pneumatic,  and  spring  stamps    1246 

separators  at  Kalgoorlie  mill 2034 

stamps 1257 

the  Denny 1257 

tables 1187 

water  for  jigs 537 

quantity    598 

table  of 596,  597 

in  classifiers 387 

Hydraulicking   897,  1006 

bibliography  for 1173 

in  Oregon.    A.  P.  Dittmar 2045 

of  low-grade  gravels.    P.  Bouery    2044 

plants    1006 

under  artificial  pressure.    J.  A.  Yeatman   2044 

See  also  Placer. 

Hydrochloric  acid  in  settling  tests 1147 

used  on  plates 752 

Hydrogen,  atomic  weight  of 1 188 

amalgamator    787 

Hyposulphite  leaching   ^ 1167 

I 

Ice,  specific  gravity  of 1 189 

Ichon,  separation  process 839 

Idaho,  cost  of  mining  and  milling  in    1130 

milling  in   1134 

dredging  in 1009 

mill  in 1178 

mine,  Alabama,  mill  at   1 174 

amalgamation  at  787 

Springs,  Colorado,  Cammett  table  at 677 

mills  at 915,  1029,  1047 

pan  concentrator 683 

shaking  screens  at 342 

Idlers  for  belts 1094 

Idlewild  Gold  Mining  Co.,  mill 1021 

Idria,  Austria,  hand  picking  at    493 

mill  for  quicksilver  ore 1074 

picking  of  waste  at 481 

quicksilver  dressing  at 1183 

I  Know  mill xxv,  901 

Emenite,  specific  gravity  of 1 189 

Imlay  table 681 

I.  M.  M.  standard  laboratory  sieve  scale 1362 

Impact  screen    1348,  1351 

at  Mill  151 1803 


50 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Imperfections  of  deep- pocket  classifiers 409 

Imperial  magnetic  separator 2209 

.  2019 
.  1350 
.  1311 
.  1312 


ore  screen 

table  of  sizes  and  capacities  of  the    

Improved  Huntingdon  mill    

table  of  sizes,  power,  speeds,  and  weights 


Impulse  water  wheels  ..........................  1089 

Impurities  in  amalgam,  removal    ................  251 

Inch,  equivalents  of   ............................  1187 

Included  grains  .............................  318,  1121 

action  of  ................................  892 

Indian  metallic  red  paint  mine  ...................  839 

Indicator  bell  on  steam  stamps    ..................  129 

cards  of  steam  stamps  .............  130,  131,  132,  133 

vanners  ....................  .  ..........  657 

diagrams    of    Nordberg    single-cyclinder    steam 

stamp  ...............................  1250,  1251 

steeple-compound  stamp  ...............  1254 

for  jig   ....................................  632 

Individual  mortar  ..............................  2012 

mortars  at  Mill  165   ........................  1852 

Merrill's  mortar  ..........................  1264 

M.  P.  Boss  mortar  .......................  1265 

Nissen  mortar   ...........................  1263 

Rapid  Economy  ..........................  1266 

Induction  motor,  increased  use  of  in  milling  .......  1927 

Ingalls,  W.  R.,  conveyors   .......................  1609 

Ferraris  ball  mill  .....................    1323,  2014 

Giroux  mill,  Ely,  Nevada  ..................  2039 

gold  dredging  in  the  United  States   .........  1183 

milling  ................................  2040 

Macquisten  process    ......................  1569 

mill  of  the  Steptoe  Valley  S.  &  M.  Co.,  Ely, 

Nevada  '  ........................  .  .....  2039 

milling  the  ore  of  Bingham,  Utah  ..........  2039 

ore  drying  ...............................  1610 

power  required  for  screw  conveyors    ........  1583 

Inman,  A.  L.,  multiple  jaw  breaker  plant  ..........  57 

on  breakers  ..............................  57 

Inscribing  circles  for  cams  .......................  196 

gravity  stamps  .........................  216 

Inside  amalgamated  plates   ......................  178 

amalgamation      ............................  223 

Inspection  of  jig  bed    ...........................  1171 

Instalment  plan  of  mills    ........................  1118 

Institution  of  mining  and  metallurgy  on  sieve  scales  1362 

Instructions  for  mounting  Blake  breaker  ..........  18 

Interest  and  depreciation  on  breakers  .............  49 

Intermediary  jig    ...............................  571 

Intermediate  bins   ..............................  843 

Intermittent  automatic  discharge  for  jigs     .........  584 

bumping  tables   ............................  682 

movable  sieve  power  jigs  ....................  506 

or  tank  system  of  working  amalgamating  pan    .  248 

surface  tables  ..............................  700 

blanket  tables    .........................  703 

carpet  tables  ...........................  703 

cocoa  matting    .........................  702 

Cornish  "frames"  ......................  704 

German  sweeping  tables   ................  703 

International  committee  of  atomic  weights    ........  1188 

Emery  &  Corundum  Co.,  mill  ..........  1078,  1079 

magnetic  separator  ..........................  1533 

separators  at  mills  .........  1535,  1746,  1747,  1748 

Phosphate  Company,  McLanahan  and  Stone  sin- 

gle-roll crusher  at  ......................  1241 

Interstitial  currents,  tests  on    ....................  626 

factor  on  jigs  ..............................  575 

ratios  on  jigs  ........................  627,  630,  631 

Investigation  of  box  classifiers   ...................  434 

feed,  slope,  and  water  for  film  sizing  tables  .  .  707 

pulsion  and  suction  in  mill  jigs  .............  632 

settling  of  fine  grains  ......................  473 

Wilfley  table  wo-k  ........................  1469 

classified  feed  ......................  1473 

conclusions  ........................  1477 

discussion  of  results   ................  1474 

natural  feed  ........................  1471 

practical  applications  of  results    ......  1477 

sized  feed  ..........................  1473 

Iodide  of  methyl  ..............................  1156 

potassium  and  mercury 
Iodine,  atomic  weight  of 
lodvrite,  specific  gravity  of 
Indium,  atomic  weight  of 


1  156 
1188 
1189 
1188 
1189 
1189 
Irish  Creek,  tin  ore  at  ...........................     288 

Iron-aluminum,  alloy  for  jig  beds  .................     575 

Iron  amalgam   ..............................  730,   751 


specific  gravity  of 
rHosmine,  specific  gravity  of 


Iron,  atomic  weight  of Hgg 

balls  for  jig  beds  at  Mill  183 1458 

City  mill,  effect  of  slow  drop  stamps 220 

cloth  screens 173 

concentrates,  disadvantage  of 1053 

crushing    QQ 

for  jig  screens    545 

mill  buildings 1088 

surface  of  Gilpin  County  table 681 

frames  for  jigs   522 

vanners 651 

Gate,  Virginia,  iron  ore  from 809 

guides  for  stamps   155 

Jig    510 

life  of 604 

tanks 522 

lining  for  ore  bins  • 842 

lost  in  pan  amalgamation 249 

magnetic  oxides  of    813 

manufacture  in  Alaska.     W.  B.  Phillips    2025 

Mountain,  Bradford  jig  at    500 

hydraulic  nozzle  at  334 

mill  at 895,  897,  1185 

plate  screens  in 173 

sampling  at    845 

sizing  tests  of  trommel  products  at 383 

ore  by  Edison  process,  preparation  of 2010 

concentrated  by  magnets 798 

concentration  of 2018 

bibliography  for 1173 

Lake  Superior.    L.  H.  Hardenburgh  ....  2036 

R.  Nordensten 2040 

cost  of  milling 1 135 

producing  concentrates    in   eastern    United 

States  1986,  1987 

in  Quebec,  milling  of  chrome.     W.  H.   Ed- 
wards    2043 

jig  for   518 

magnetized  by  heat    799,   800 

mills  for 895,  1053,  1065,  1066 

of  Coleraine,  Minn 1924 

separated  by  magnets 790 

treated  by  hydraulic  nozzle     334 

in  log  washer 324 

by  wash  trommel    330 

washing.     W.  Kellett 2018 

ores   in  Birmingham,    Alabama,    washing   soft. 

W.  R.  Crane   2041 

magnetic  separation  of.     H.  Wedding    2030 

roasted  for  magnetism 814 

to  magnetic  oxides    813 

washing  of  Mesabi 2040 

permeability  of    792 

pipe 1106 

sizes 405 

punchings  for  jig  bed 574 

riffles  722 

riffle  tables  on  dredges 1008 

sieve  frames  for  jigs  539 

specific  gravity  of  1189 

cast    1189 

wrought 1 189 

stamp  frames 158 

strip  for  fastening  amalgamated  plates 735 

table  for  amalgamated  plates 735 

wear  and  loss  of,  in  amalgamating  pans 249 

Irons  on  launders 872 

Irregularity  of  feeding   1115 

Isbells  improved  hydraulic  sizer 2020 

Isel  Corundum  Co.,  mill  1183 

Ivanhoe  mill    1731 


Tack  ..........................................     900 

Jacket  shaft  for  gravity  stamps  ..................     199 

steam  for  amalgamating  pan    ................     243 

Jackling  conveyor  belts  at  Mill  167    ..............    1859 

Jackson,  California,  mill  at  ............  1031,  1034,  1037 

vanner  at    .............................     653 

concentrator,  Idaho  Springs,  Colorado.     C.  M. 
Rath  and  R.  L.  Grider  ....................   2042 


roll  speeds    ................................       °7 

James,  Alfred,  definition  of  slimes  ................    1398 

discussions  of  the  tube  mill  ................   2015 

milling  practice  on  the  Rand   ..............   2014 

tube  mill  installation  .....................  2014 

automatic  ore  feeder  ........................   2032 


51 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


James  Bogardus  eccentric  mill 259 

Carkeek  classifier   416 

concentrator 1490 

slimer    1491 

Jamieson,  M.  B.  and  J.  Howell,  Collom  jigs  at  Broken 

Hill   .. : 643 

concentrating  silver  ores  at  Broken  Hill,  New 

South  Wales 1182 

stamps  at  Broken  Hill,  New  South  Wales  .     227 
steam  stamps  at  Broken  Hill,  New  South 

Wales    142 

Janin,  L.  Jr viii 

adjustments  of  a  stamp  battery 227 

amalgamated  plates 743,  748,  750 

amalgamating  pans 291 

arrastra 290 

impurities  in  amalgam 251 

plates  and  traps 789 

purifying  mercury 785 

rolls  for  cyanide  process    Ill 

straining  amalgam    781 

Jaquet,  J.  B.,  hydraulicking  in  New  South  Wales  .  .    1178 

Jar,  affecting  settling  of  slimes 1149 

effect  of,  on  plates 735,  761 

Jars  for  settling  tests    1146 

Jarvis,  R.  P.,  determination  of  the  hindered-settling 

ratio  between  quartz  and  galena   1460 

investigation  on  jigging 1463 

suction  in  jigging    1462 

Jaw  breakers  55-57 

action  of 36 

capacity  of 52 

classified  13 

compared  with  spindle  breakers 51,  53 

cost  of 52 

distribution  of  crushing  in  mill 54 

fine  crushing  in 54 

friction    54 

general  remarks 33 

having  equal  motion  on  coarse  and  fine  lumps       25 
greatest  movement  on  largest  lump    ...  .28,  1205 

smallest  lump   13,  1200 

intermittent  action  of 55 

Krupp's  wearing  parts  for 1221 

necessity  for  simplicity  of  action  in 36 

number  used    51 

of  Dodge  type 28 

Western  Wheeled  Scraper  Co 25 

power  of 52 

principle  of  action 52 

running  cost 54 

size  and  shape  of  mouth 54 

sizing  tests  of  product    53 

table  of  cost  of  crushing  of 50 

taper 52 

tests  on  work  required  for 307 

weight  of 52 

breaker  plates,  comparative  wear  of  metals  for, 

in  Blake  breakers 48 

movements  on  breakers  34 

Jeffrey  belt  conveyor   859 

conveyors  at  Mill  183 1913 

Century  conveyor  belt 2032 

coke  crusher 2013 

Columbian  separator    2019 

double  beaded  flight  conveyor  at  Mill  126 1706 

Manufacturing  Co.,  bucket  elevators    864 

Columbian  pulsating  screen    343 

drag  or  disc  conveyors 1583 

friction  clutches    1607 

pulverizer  and  shredder 1321,  1323 

table  of  sizes,  capacities,  power,  etc 1322 

steel  link-chain  scraper-conveyor  at  Mill  126  ...   1709 

swing  hammer  crusher 1281 

capacity  of 2015 

trippers  at  Mill  183    1913 

Jenlsch  ball  mill    233,  261 

Jenkins,  C.  V.,  keeping  accounts 1184 

Jenks,  C.  N.,  dressing  corundum 1183 

washing  pan  for  corundum 335 

Jerking  tables    667 

Bartlett  492 

for  testing 1153,  1171 

principle  of 644 

trough  conveyors 861 

Jets  on  slime  tables    688,    689 

Jet  washer   334 

J.  H.  Frenier  and  Son,  spiral  sand  pump  made  by    .     870 

Jig  and  table  departments  at  mills 1691,  1811 

bedding  1458 


52 


Jig  bed  inspection 1 171 

beds,  boils,  and  hard  banks    600 

box 495 

concentrates,  removal  of    586 

department  at  Mill  161 1841 

discharges .     510 

at  Mill  137 1458 

Krupp  Harz 1446 

New  Century  jig 1445 

Woodbury 1447 

frames 507,   522 

Hancock  1459 

hutches 523 

indicator 632 

linings  527 

mechanism  519 

mechanisms.     See  the  Individual  Jigs. 

New  Century 1459 

Richards'  pulsating 1459 

screens  and  screen  frames    510,  538 

cost  of 547 

cross  bars  on 504,  574 

details  of 540 

length  of 592 

materials  for    545 

percentage  of  opening    546 

slope  of 548 

supports  for 539 

spigots 527 

tailings,  definition  of 494 

removal  of    587 

tanks,  materials  for 522 

testing 1161 

Jigging,  an  investigation  on.     R.  P.  Jarvis 1463 

comparison  of  English  and  continental  system  of. 

H.  S.  Munroe 1463 

effect  of  suction 628 

English  system  of 1463 

general  principles  of  pulsion  in    1460 

suction  in 1461 

laws  of    610 

lever  on  hand  jigs 496 

mills    1101,  1103 

power  used  in   602 

using  hand  jigs 802 

new  developments  in    2022 

pulsion  velocity  in 1460 

sizing  before 1463 

suction  and  pulsion  in 1460 

tank 495 

tests 1165 

on  mixed  sizes 630 

theory  of 631 

suction  in  jigging    1462 

without  sizing    609 

Jigs  494,  1150 

See  also  Air  Jigs,  Hand  Jigs,  Harz  Jigs. 

accelerated 507, 510,  515,  519 

mechanisms  for 533 

action  of 494 

adjustments  of 595 

pulsion  and  suction 598 

throw 531 

air 640,820 

bibliography  for 837 

versus  water 826 

and  vanners  versus  oil  concentration 832 

results  compared  with  Elmore  process    ....     832 

Argall's  639 

at  mills..  1448,  1449,  1685,  1686,  1692,  1693,  1694, 
1701,  1702,  1703,  1707,  1708,  1714,  1720,  1725, 
1728,  1729,  1737,  1738,  1743,  1744,  1750,  1751,  1752, 
1753,  1767,  1772,  1773,  1774,  1775,  1788,  1789,  1792, 
1793,  1796,  1797,  1798,  1799,  1800,  1801,  1812,  1829, 
1832,  1833,  1837,  1843,  1844,  1845,  1849,  1854  1855, 
1858,  1864,  1867,  1869,  1877,  1878,  1879,  1885,  1892, 
1893,  1902,  1903,  1904,  1905,  1913,  1928,  1929,  1930 

automatic  discharges  for  576,  577 

Baum    519 

bibliography  of   639 

Bilharz  circular %  504,  518 

oblong  movable  sieve  503 

bottom  bed  of,  products  of 495 

Bradford 500 

Braun   .      641 

buddle 518 

cam  and  gravity  in  Stutz  coal  jigs    537 

spring  mechanism  for  507 

capacity  of 599 

power  and  water 596,  597 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Jigs,  Cazin's  640,  641,  642,  643 

center  discharge  in 582 

changes  in  the  Harz 2022 

circular 518 

classes  of 551 

classification  of  551 

classifier  1447 

at  Mill  120 1452 

cleaning  sieves  of 576 

clearance  of  plunger 529,  530 

coarse  concentrates  of  494 

Collom 510,  1440,  1446 

compartments  in  507 

compressed  air 519 

Conkling 503 

connecting  rods  for 530 

construction  of 524,  527 

continuous  movable  sieve  power 499 

Cooley 522,643 

cost  of 604,  1126 

cover 537 

dead  box  on 510 

depth  of  longitudinal  partition 524 

details  of 552 

Diescher  coal 520 

difference  in  specific  gravity  of  minerals  for  ...  609 

different  types  of 2021 

differential-motion,  variable-crank  mechanism 

of 1457 

disc  motion  in 536 

discharges  into  the  hutch 586 

with  unwatering  sieves 586 

disposal  of  concentrates  in  585 

double  discharge  in 583 

with  one  shaft 530 

drop  between  sieves  549 

eccentric  for 510,  531 

effect  of  bedding  1463 

slimy  water  599 

elliptical  gear  in  536 

Evans  517 

Evrard's 642,  643 

experimental  data  on.  G.  C.  Bring 2022 

feed  aprons  for  549 

box  for 549 

Ferraris  intermediate  539,  540,  584 

fine  concentrates  of 495 

fixed  sieve 507,  1444 

for  testing 1150,  1174,  1989 

three  mineral  separation    590 

two  mineral  separation 589 

four  mineral  separation  on  590 

Francou  519,  643 

gate  and  dam  discharges  577 

general  considerations  522 

Green's  movable  sieve 639 

Hancock  504,  643,  1440 

hand  495,  519 

practice  in  the  mills 498 

Harz  compared  with  Collom 515 

-eccentric  bedded  sand  jig  at  Mill  125 1703 

type  507 

head  plunger  form  518 

Heberwasche  520 

height  of  gate  and  dam 578 

tailboard 550 

hinged  connecting  rod  for 530 

Hodge 1440,  1446 

Hooper's  vanning  505 

Huet  &  Geyler's , 641,  643 

hutch  spigot 507 

hydraulic  water  quantity  in 537,  598 

indicator  cards  of  632 

intermittent  automatic  discharge 584 

movable  sieve 506 

interstitial  factor 575 

iron  510 

balls  for  bedding 1458 

sieve  frames  539 

kinds  of 525 

Krom's  penumatic  824 

Krupp  Harz 1446 

labor  for 604 

Lamarche  and  Schwarz 641 

Lemiere's  643 

length  of  stroke 594 

life  of 604 

limits  of  sizes  treated  by 604 

longitudinal  partition. .  . '. 524 

Luhrig 538 


53 


Jigs,  McLanahan's 518,  538 

making  coarse  concentrates  and  tailings 570 

hutch  and  tailings 571 

hutch  and  tailings 572 

material  of  bottom  bed    573 

materials  for  tanks 522 

May's    643 

mechanism  for 517 

method  of  running   551 

methods  of  feeding  543 

movable  sieve  hand    495 

AT  testing ;;;•  627 

JNew  Century 1444 

drop  motion 537 

number  of  compartments '.  588 

strokes 592 

operation  of 506 

Osterspey 538,  642 

Parsons  &  Fisher 517 

pipe  discharge  in 583 

Plumb  circular 641 

plunger 528 

attachment  to  connecting  rods 529 

plungers  for 510,  517 

on 510 

position  of  1 108 

power  used  by 602 

principle  and  advantages  of  2022 

purpose,  and  definitions 494 

products  of 494 

pulsion  518,  538 

and  suction  investigated 632 

type  520 

purpose  and  adjustments 552 

range  of  sizes  fed  to 606 

relation  of  sieve  to  plunger 528 

removal  of  coarse  concentrates 576 

tailings  in 587 

repairs  on 604 

Rexroth '. .  641 

Richards'  pulsator  jig 1453 

table  of  sizes,  capacities,  and  dimensions  .  1455 

Rittinger's 643 

Robinson  504 

Rogers 642 

Schranz 503,  641 

screen  saving  device  for 2022 

shaft  and  pulleys  for  532 

Sheppard  538,  642 

side  discharge  in 580 

plunger 529 

sieve  wires  and  prices 547 

sieves 641 

size  of  grains  of  bottom  bed 575 

sieve  hole  573 

sizing  before  jigging 1463 

skimming  of 576 

slime  518 

slope  of  hutches  in 523 

sieves 548 

slow  return 533 

speed  of  592 

Spilsbury 527 

spring  and  bell  crank  mechanism  for 511 

Stapff 642,  643 

stay  box  for 551 

boxes  for  discharges  584 

steam  driven  519 

Stroh's 642 

study  of  water.  N.  V.  Hansell 1463 

G.  G.  Bring 1463 

Stutz  538 

coal  523 

tailboards  for 510 

testing  of 1170 

tests  on  suction  in 627 

thickness  of  bottom  bed 575 

top  layer  of,  products  of 495 

under-piston  type  520 

unwatering  boxes  588 

Utsch 519,  640,  641 

versus  Ferraris  tables.  M.  Lenicque 2021 

magnets 836 

tables 606,  '641 

Vezin 1150 

water  for 537,  598 

Wendt 530,  640 

whole  bed  of,  products  of 495 

width  of  sieves 591 

Wimmers  643 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Jigs  with  movable  sieves -  •  •  • 

Woodbury  1440' 

working  of •  • 

Johannesborg,  Sweden,  mill  at 

mill 

South  Africa,  mill  at  

Johnson  • 

figures  on  sampling 

filter  press  at  Mill  117 

F.  M.,  on  Griffin  mill    : ;  • ;  • 

G.  and  A.  Treloar,  magnetic  separation  of  tin 
and  wolfram •  •  •  •  •  •  •  -.-.•  ; 

G.  R.,  log  washer  at  Longdale,  Virginia    

log  washing  plant  at  Longdale,  Va 

J.  E.,  Jr.,  automatic  shoveler     ........... 

reservoirs  for  tailings  of  the  Longdale  Iron  Co 


1440 


»»•> 
477 


mechanical  sand  shoveler 46 1,  899 

at  Mill  155 *°}' 

ore  mill.    J.  Johnson  •••••••• • z"i? 

Paul,  Cornish  sampling  at  El  Paso  smelter »»« 

rules  for  sampling < 

steel  for  wearing  parts  of  breakers    . .  .^  - . .  ^   ^jg 

1834,  1850,  1851,  1852, 
1858 
.    1620 


Johnston  vanner  . . 

vanners  at  mills  . .  1502, 


844> 

.  -  •  •  •  -  •  - 

1971,  1972, 


Karwin,  jigs  at 

Kas,  A.,  Distl-Susky  screw  grate 


668 

728 


1182 
997 
1555 


in  California  practice 

John  Taylor  and  Company 

Joints  for  belts    .•  •  • : 

Jones,  Clemens,  costs  of  concentrating  iron  ore 

magnetic  separation  of  iron 

magnetizing  hematite  

sampler .-.  •  •  • 

Joplin  district,  cost  of  milling  .... 

producing  zinc  in 

hand  jigging  practice »»* 

mill  in  the    *£»? 

milling  in  the.    E.  Hedburg 2041 

milling  the  sheet  ore  of.     D.  Bnttam  .......   2039 

reverberatory  furnace  for  magnetic  separation    1545 

Foundry  Company,  roll  shells  at  Mill  148 1792 

Jack  table,  a  magnetic  separator •   ^025 

Missouri,  mill  at '1709 

practice  at  Mill  148 .  •  •  •  •  •  -  •  • I792 

Separating  Company,  Cleveland-Knowles   sepa- 

Jordan?  centrifugal  'grinder  and  amalgamator    . . . 

bibliography  for *™ 

pulverizer 2qq 

bibliography  for •  •  •  •  •  •  •  •  •      ^2 

Joseph  Wharton  mill 1053,  1054,  1117 

Mining  Co.,  mill • :  •  •  •  •    •    •  •    1°58 

Joshua  Hendy  Iron  Works  Company,  Finder  Con- 

centrator •  •  •  •  • l< 

Machine  Works.     See  Hendy,  J. 

Machine  Works I96,  209,  229 

breaker  used    ** 

vanner ^%Z 

Journal  lubrication ^|j" 

Journals,  care  of ^L 

for  rolls qe 

friction  in - 0^": 

Jubilee  &  Salisbury  mill,  details  of  stamps  2^1 

Tudd   E.  K.,  concentration  at  Virgilina.    .  . 2UdS 

'  ultra-violet  rays  for  detection  of  willemite ....   204 
Julian  and  Smart,  cyanidings  of  gold  and  silver  ores  IMA 

Jumpers  Deep  mill ||°Y 

mine,  weight  of  ore  at liyi 


Kalb,  Courtenay  de   .........  ....................     257 

Kalgoorlie,  ball  mill  practice  in  ..................    1302 

dry  crushing  at   ............................   *"•»« 

Kamfersdam  mill    .......  •  •  -  •  ...................    10»0 

Kanawha  freestone,  strength  of  ...................     »"£ 

Kansas,  hand  jigging  in  ........................     °»o 

mill    ......................................   1  1  AQ 

Kaolin  Mfg.  Co.,  settling  apparatus  ...............    ii«» 

settling  of  .................................   l\*l 

rate  of  ..................................     |ij 

use  of  alum  for  settling  ..................  •  •  •  •     *g» 

washing  ...............................  1075,  1183 

T.  C.  Hopkins  .......................  2026,  2028 

Kaolimte,  specific  gravity  of  ...................  4«« 

Karlik  oscillating  grizzly  ......................  MR  ' 


Kavan,  Rittinger  table     

Kavicic,  J.,  Rittinger  table 

Kayser,  H.  W.  F.  and  Richard  Pro  vis,  tin  dressing  at 

Bischoff,  Tasmania 

Kearsarge  mine 

Keedy  dry-ore  sizer    

Keewatin,  Ontario,  mill  at   ll«>/ 

vanners  at "J?J 

Kegelmvihle •  •  •  •  232    255 

Keith,  N.  S.,  amalgamating  plates 7*7'J2P>  789 

Kellogg,  Idaho,  mill  at    -  -  •  •  •  •  •  •  •  •  -  937,   951 

Kelly  mill,  Socorro,  New  Mexico.     W.  M    Johnson  2046 
Kemp  J.  F.,  Desloge  mill  for  galena  in  Missouri. . .    11S5 

ore  deposits  of  U.  S.  and  Canada 1924 

Kennedy  gyratory  breakers .-„•  •  •  •  •  •    ]*M 

Mining  and  Milling  Company  mill  .  .xxviu,  1031,  1037 

spindle  breaker •  • ::A    |2f3 

Kennicutt  system  of  softening  water 141b,  1419 

Kensington,  F.  R.,  washing  iron  ore  at  Cabarceno, 

Spain          1182 

Frederick',  wash  trommel •  •     335 

Kent,  centrifugal  force ias*  206*  250 

cost  of  power *««»,  20b,  2t>U 

gauges ! 

journal  pressure  in  rolls »" 

lubricants •  •  •  •    *™' 

mill 128°.  1303 

mill  similar  to  the *"|' 

pulverizing  mill  • 7  onl 

roller  mill,  table  of  details  of  the 1304 

screen  gauge 

water  pipes 

William .. 

engineers'  pocket  book ** 

strength  of  stone  «j|Y 

Kessler  magnetic  separator °££ 

Kettle  for  amalgam •  •  •  •  •  •  •  • 'g° 

Key,  A.  Cooper,  hand  picking  on  the  Rand ' 

to  mill  numbers •  •  •  •     ^ 

the  outline  of  mills 1614,  1615 

Keys  for  stamp  cams iyi>  |££ 

stamp  tappets • \°? 

Keystone  Consolidated  Mining  Company  mill  .  -^^^j 

mill,  mortars    1  Jjjj 

Kia  Ora  dredge ;  • i- 

Gold  Dredging  Company  mill   xxyu 

.-.lor.*-  lUUo 

...726,1464,  1510 


858 

.50,  93,  104,  1097,  1173 


bibliography  for 
continuous 

coupled  with  slime  tables 
depth  of  bed 
details  of  in  mills 
for  cleaning  jig  concentrates 
iples  of 


' 


pnnci pica  UL -  -trim 

used  in  gold  dredging 1013 

Kiln  for  drying   *°i 

Kilo  of  water • **°' 

or  kilogram,  equivalents  of iiaa 

per  square  centimeter *|°' 

Kilogram-meters,  equivalents  of *|<*» 

Knometer,  equivalents  of ||«' 

Kilowatts,  equivalents  of •  •  •  |^°° 

Kimberley,  diamond  washing  at »dy,  luou 

mines,  weight  of  ore 1i?i 

weathering  blue  ground  at 
Kimberlite 


1081 


., 

Karlik  and  Klein  moving  grizzlies 


Kimberly  Wilfley  mill,  Kokomo,  Colorado 2046 

Kinds  of  crushing  actions   ** 

ore  for  gravity  stamps   - 

surface  on  slime  tables 

King  Brothers  mines,  mill 

bucking  board    

Clarence,  amalgamating  pans g" 

gravity  stamps r,^ 

settlers  and  agitators    '°' 

silver  amalgamation  •;•••••••••• :  •  -.^   1 

United  States  Geological  explorations  of  4 

parallel    

Washoe  and  Reese  River  processes 

magnetic  separator 

revolving  screen 

advantages  of  the   

KingST'FoSndry"  and  Machine  Company  cent- 
rifugal pump  at  Mill  127  •  • •  •••  

Kingston  School  of  Mines,  testing  laboratory  of  the 
G  J.  McKay 204{ 


'1079,  1117 
.1279,  1285 


1173 
832 
2018 
2019 
1356,  1360 


54 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Kinkead  ball  mill  

234 

bibliography  for  ... 
mill    
at  Goldfield,  Nevada 
bibliography  for  .  .  . 

295 
....235,276,  1184,2014 
,  use  of  the.     C.  T.  Rice.   2038 
.     296 

number  used    
Kirby  E   B    jigs 

231 
.    .      .     643 

systems  of  ore  dressi 

mr    .                               ..   1184 

weight  of  broken  ore    1 190 

weights  of  ores 1179 

K'rschner,  L.,  breaking 56 

Gates  and  Blake  breakers 56 

gold  mills  in  Europe 1173 

gravity  stamps 223 

Grundriss  der  Erzauf bereitung xx 

Kavan-Rittinger  and  Luhrig  tables 729 

Laszlo's  amalgamator 787 

magnetic  separation   832 

movable  sieve  hand  jig,  Harz  and  Bilharz  jigs     639 

Pape-Henneberg  concentrator 839 

picking  tables 492 

pointed  boxes,  spitzlutte 476 

Schranz  mill 296 

slime  tables 727 

three  types  of  rolls 109 

Kirsten  and  Labram,  greased  table 831 

Klein  classifier.     F.  H.  Regel 2020 

principle  of 2020 

jig,  description  of  the     2021 

L.  A.,  dressing  asbestos 1182 

moving  grizzly  bars 386 

Klein's  solution 1156 

Kley  breaker   55 

Knee-frames  for  gravity  stamps   157,  158 

Knife  for  scraping  plates 762 

Knight  water  wheel 1033,  1035,  1089,  1090 

Knobs,  rolls  with 104-106 

Knochenhauer,  B.,  amalgam    788 

arrastra 290 

California  stamps 225 

figures  on  California  gold  mills    1177 

Knop  turbine 973 

Knott  dredge  1011 

Knowles'  duplex  vacuum  pumps  at  Mill  117 1673 

New  Century  magnetic  separator 1541,  1568 

table  of  sizes,  capacities,  speeds,  power, 

weights,  etc.,  of 1542 

pump 872,  914,  922 

triplex  pump  at  Mill  117 1674 

Knox  amalgamating  pan 776 

Koch,  E.,  amalgamating  pans  on  Comstock  lode 291 

capacity  of  jigs    597 

Gottesgabe  and  Hammerwasche  mills  in  West- 
phalia        1177 

jigs  at  Gottesgabe  and  Hammerwasche  mills  at 

Westphalia  641 

stamps  in  Comstock  mills  230 

stroke  of  jigs   594 

H.,  ore  dressing  at  Tarnowitz,  Silesia 1186 

Kohinoor  mill    907 

Empire  Zinc  Company xxv 

Kohler  on  jigs 643 

Kolar  District,  India,  cost  of  producing  gold  in  . .  1981,  1982, 

1983 

Kolshorn  &  Streckers  grinder   232 

bibliography  for 292 

Kominor  mill 2017 

Konus  breaker 2010 

Kootenay  Ore  Company,  B.  C.,  the  custom  mill  of 

the 2045 

Koppel  shoes  and  dies  at  Mill  97  1620 

Kosmann,  Freideberg  mill 297 

Propfe  mill 297 

Kossmann,  B.,  Nicholas  pulverizer  292 

Krause  mortar  discharge  for  steam  stamps  . .  997,  1003,  1256 

at  Mill  179 1897 

pneumatic  stamp 141 

Kreiss  jerking  conyeyor 884 

Kretschmer,  Franz,  graphite  dressing  in  Moravia  . .  .    1183 
Krogh  centrifugal  pump  at  mills  . .  1626,  1627,  1633,  1929, 

1930 

Krom  air  jig 824 

belted  rolls  82 

breaker 56 

movement  of  jaws 34 

of  Dodge  type 31 

cushioned  rolls 2010 

pneumatic  jig 824 

products  from,  on  De  Soto  mine  ore 824 

results  on  Seminole  ore   821 


Krom  rolling  toggle  breaker 2010 

rolls  109,  110,  112,  224,  1182 

sectional  breaker  of  Blake  type   21 

S.  R 30,31,45 

advantages  of  air  over  water 838 

and  H  .Van  F .  Furman,  pneumatic  concentration  838 

T.  A.  Blake,  improvements  by  Krom 59 

boxes  for  rolls   73 

breakers    57,  59,  60 

Cornish  rolls  versus  Krom  rolls ....  110 

stamps ;;  112 

Krom  breaker   57 

Krom's  pneumatic  jig    ; 839 

maker  of  Rutter  breaker 45 

roll  speeds .87,  88 

tires  65 

rolls 72,  77,  111 

sizing  test  of  roll  product    100 

stamps  and  rolls   316 

versus  rolls  230 

Sturtevant  mill  versus  rolls 110,  298 

Krupp  amalgamating  table '  788 

ball  mill 260,  1280,  2011,  2017 

at  Mill  128 1714 

cams    1272 

cam  shaft 1272 

concentrating  table  2022 

gyratory  breakers    1215 

high-speed  rolls  1238 

description  of 1244 

magnetic  separator 2025 

mining  administration,  magnetic  plant  of 1814 

picking  tables 1435 

rock  breaker 1202 

roll  shell  turning  device    1243 

sectional  guides  for  gravity  stamps    1270 

spitzlutten,  the     1382 

tables  at  Mill  128 1715 

tube  mills  at  Mill  118     1677 

discharge  of 1288 

Krupp's  wearing  parts  for  jaw  breakers    1221 

Krypton,  atomic  weight  of   1188 

Kubale,  Sheppard  coal  jig 643 

Kunhardt,  W.  B.  and  G.  W.  Maynard,  dressing  of 

iron  ores  1 185 

jigging  tests    643 

W.  B.,  breaker  and  mill  separate    56 

breakers    56 

Brink  and  Hiibner  disintegrator 298 

buddies,  slime  tables,   percussion  tables,  and 

kieves    727 

capacity  of  jigs    597 

corrosion  of  screens    354 

crushing  concentrates 1113 

Dingey  mill    293 

drop  between  jig  sieves   550 

extent  of  crushing  desirable    315 

general  milling 1173 

gravity  stamps 223 

hand  breaking  and  picking 492 

Harz  jigs 639 

intermittent  discharge 584 

jig  bed 576 

discharges 583 

plunger  clearance    530 

jigging  unsized  material 609 

length  of  jig  sieves   592 

life  of  jigs 604 

limit  of  jigging 605,  606 

Nicholas  pulverizer 292 

ore  dressing  in  Europe xx,  1185 

pneumatic  stamps 143 

removal  of  jig  tailings    588 

roll  shells    109 

speeds 87 

running  jigs 572 

Schranz  mill 276,  296 

settling  tests 1146 

Siemens  and  Friedrichssegen  magnetic   separ- 
ators      832 

siphon  separator,  pointed  boxes,  spitzlutte   . . .  476 

slime  tables    696 

slope  of  jig  sieves   548 

slime  tables    694 

stay  boxes  for  jig  discharges 551,  585 

stroke  of  jigs   594 

thickness  of  jig  bed    575 

trommels  and  riddles 384 

wear  of  jig  screens   547 

width  of  jig  sieves    591 


55 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Kutscher,  E.,  jigs  at  Clausthal 643 

ore  dressing  at  Clausthal 1186 

Kutter  formula  for  flow  of  water 885 


Labor  cost  of  ..................................   1130 

for  breakers  ............................       51 

breaking  .............................       50 

efficiency,  effect  on  costs  .....................    1  127 

for  arrastras  ...............................     239 

canvas  tables  .............................     701 

cleaning  plates    ........................  758,  760 

Conkling  jig  .............................     503 

dredge  ..................................     898 

hand  jigs  ................................     499 

Hooper  air  jig  ............................     824 

jigs   ..................................  507,604 

mills  ....................................    1101 

pan  amalgamation    .......................     250 

trommels  ................................     361 

settling  tanks  ............................     459 

stamps  ..................................     206 

washing  pans  ............................      333 

in  the  mills  ................................    1931 

required  at  crushing  plant  of  Mill  174  ........    1883 

mills  .  .  1619,  1621,  1622,  1628,  1633,  1639,  1656, 

1664,  1676,  1678,  1685,  1688,  1698,  1705,  1709, 

1712,  1730,  1739,  1745,  1757,  1759,  1761,  1764, 

1768,  1786,  1791,  1793,  1801,  1816,  1817,  1820, 

1827,  1830,  1835,  1841,  1848,  1852,  1856,  1871, 

1881,  1887,  1890,  1918,  1920 

by  sampling  department  at  Mill  174  ........    1884 

wage  scales  at  mills..  1619,    1621,    1622,    1626,    1629, 

1633,  1657,  1664,  1676,  1678,  1680,  1685,  1687,  1688, 

1690,  1698,  1705,  1712,  1730,  1745,  1757,  1762,  1764, 

1794,  1804,  1816,  1820,  1830,  1841,  1848,  1852,  1859, 

1865,  1881,  1919 

Laboratory  breaker,  Case  ........................    1204 

ore  grinder.     McKenna  .................  1285,  1323 

slime  table.     H.  S.  Munroe    .................   2023 

tools  for  testing  ............................    1  137 

Labradorite,  specific  gravity  of  ...................    1189 

Labyrinths  ...........  .......................  447,  476 

La  Cananea,  concentration  at.     M.  Schwerin  ......   2037 

mining  camp.    D.  E.  Woodbridge    .........    1923 

Lacing  for  belts  ................................    1093 

Ladder  for  dredges  .............................    1008 

Lady  Barkly  mill,  weight  of  stamps  in  ............      190 

La  France  Copper  Company   ....................    1836 

Lagging  for  belts  ...............................    1093 

Lagrange  colliery,  air  blast  at    ...................     837 

Lake  City,  Colorado,  mill  at    ....................     935 

Harold  stamp  mill    .........................    1178 

Superior,  center  discharge  at    ................     582 

Collom  jigs  at   ...........................     515 

concentration  methods.     R.  R.  Robert  ......   2040 

copper  mills  ..114,   475,    1085,    1093,    1098,    1108, 

1109,  1113 
disposal  of  concentrates  in    ............     586 

mortar  blocks  in  ......................      148 

T.  A.  Rickard  .......................    1419 

mines,  copper  handbook  .................    1925 

rock,  settling  slimes  from    ...............     458 

size  of  grizzly  used  for  ................     340 

cost  of  die,  etc.,  at  ........................      121 

milling  at  .......................  1130,  1131 

district,  cost  of  producing  copper  in  ____  1948,  1949, 

1950 
hammers  used  ............................        10 

hog-trough  classifier  ....................  390,  476 

hydraulic  classifier,  products  of  in  Mill  46  ...      391 
Mill  45   .......................     391 

iron  ores  ................................    1054 

works  spindle  breaker  wearing  parts  ......       47 

517 
fe  of  Collom  jigs  at    .....................     604 

magnetic  concentration  at  .................     833 

method  of  feeding  jigs  at  ..................     549 

milling  practice.    A.  S.  Atkinson  ...........   2041 

mills.    T.  A.  Rickard  ....................       1997 

mills  at..  1089,  1102,  1174,  1175,  1184,  1183,  1186, 

1997 
automatic  discharge  in  ..................     577 

native  copper  mills  .......................    1  103 

disposal  of  concentrates  in    ........     587 

size  of  grains  in  ....................      693 

ore  dressing,  improvements  in    .............   2037 

region,  drop  hammers  used  in   .............        12 

steam  hammers  used  in  .................       12 


jigs 
life 


Lake  Superior,  rock  houses    485 

slime  tables  at  697 

stamp  mill,  power  used  at    310 

Lake  View  mill,  Australia.     A.  G.  Charleton 2035 

Lakes,  Arthur,  American  pebbles  for  tube  mills  ....   2015 

arrastra 2013 

H.  E.  Woods  testing  plant    2048 

Standard  mill,  Idaho 1183 

Lamar,  J.  R.  de 284 

Lamarche  and  Schwarz  coal  jig 641 

Lamb  automatic  tailings  sampler  . .  . 1573,  1609 

H.  M.,  mining  in  British  Columbia    2035 

M.  R.,  cyaniding  at  Goldfield,  Nevada    1922 

the  Combination  mill,  Goldfield,  Nevada 2038 

Lamberton  mill 234 

bibliography  for 295 

Lamprecht,  R.,  breakers 56 

Brown's  spindle  breaker,  Wolf's  jaw  breaker         56 

Carr  disintegrator 298 

classifiers  for  coal 476 

coal  jigs 574 

coarse  and  fine  jigs  for  coal   639 

cone  mill 292 

Die  Kohlenaufbereitung xx 

grizzlies,  riddles,  and  trommels    384 

revolving  and  belt  tables 492 

rolls  for  crushing  coal    109 

Lancaster  breaker 59,  60 

Company,  James  H.,    Lancaster   rotary    pumps  1589 

T.  H.,  the  Lancaster  gold  amalgamator 1520 

pebble  phosphate 895 

Co.,  mill  xxv,  897 

Landis,  H.  K.,  blende  mills  in  Missouri 1179 

hand  jigs  and  Harz  jigs 642 

jigs  at  Friedensville,  Pa 642 

Yeatman  hydraulic  classifier     477 

zinc  ore  dressing  at  Friedensville,  Pennsylvania  1 178 

Landolt  and  Bornstein xx 

tables 1188 

Lane  Chili  mills    2014 

milling  practice  with  the 2016 

J.  A.  Stewart 2015 

slow-speed  mill 1280,  1308 

at  Bonita  Mining  Co.'s  property 1309 

Langerfeld,  A.,  new  coal  picker 2021 

Langguth,  E.,  history  of  magnetic  separation 2031 

magnetic  properties  of  minerals 837 

Langley's  crusher,  bibliography  for 296 

dry  crusher 274 

improved  dry  crusher 234 

Lannisdorf ,  centrifugal  machine  at 820 

Lanthanum,  atomic  weight  of    1188 

La  Point  Flour  Gold  Separating  Company,  the  C.  A., 

suspended  riffles 1509 

gold  separators,  table  of  sizes,  capacities,  and 

weights   1510 

Lard    1097 

Largest  size  of  concentrates  saved  in  the  mills  1119 

tailings  in  the  mills 1119 

Laschinger's  formula  for  average  grain    1293 

Last  Chance  mill xxvi,  945 

Laszlo  amalgamator 777 

Lateral  thrust,  right  and  left  hand  cams    195 

Latrobe  steel  die  rings  and  roller  shells,  life  of  in  mills  1728, 

1749,  1771,  1773 
wearing  parts  of  Huntington  mills,  life  of  at 

Mill  139   1753 

Latta     &    Martin    Pump    Company,    displacement 

pump   1589,  1610 

at  Mill  144    1590,  1779 

Lattes,  O.,  ore  dressing  at  Przibram    1177 

Laumontite,  specific  gravity  of 1189 

Launders 872,  1592 

at  Mill  152 1812 

bibliography  for 885 

Blue's  experiments  with 1594 

distributing  or  sizing    1417 

description  of  pipe.     C.  W.  Van  Law    1609 

design  and  flow  of  sands.     F.  K.  Blue 2032 

flow  of  sand  in.     F.  K.  Blue   1609 

for  amalgamated  plates 743 

canvas  tables 700,  701,  702 

shunting   1109 

spitzkasten 440 

hydraulic  mean  depth    876 

in  the  mills 874 

linings  for 1595 

mean  velocities  of  water  in 877 

on  Linkenbach  slime  table   69 1 

Overstrom's  experiments  with    1592 


56 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Launders,  pipe  launders  at  Guanajuato  1595 

plate  glass  launder  linings  at  Mill  173 1595 

quantities  of  water  in 878 

rectangular 877 

skimming  as  applied  to  clarifying  tanks 1409 

speed  of  water  current  necessary  to  carry  sand  .  878 

theory  of  flow  in  876 

wetted  perimeter  876 

Laurenburg,  Prussia,  hand  picking  at 492 

jigging  at 609 

mill  at ; 961,  1086,  1116,  1177 

sieve' scale  at   367 

picking  at 487 

running  jigs  at    572 

Schranz  mill  at 276 

Laurium,  Greece,  magnetic  separation  at    812 

Lautenthal,  classifier  at  479 

hand  picking  at 492 

jigging  at    609 

jigs  at   643 

mill  at 1086 

picking  at 487 

range  of  sizes  at    609 

sieve  scale  in  mill 367 

Lawrence,  H.  L.,  dressing  zinc  blende  and  magnetite 

at  new  Pierrefitte  mines,  France    1182 

Machine  Co.,  centrifugal  pumps    869 

Laws  of  classifying  '. 464 

bibliography  for 475 

crushing     300,  1325 

bibliography  for 315 

conditions  under  which  crushing  is  effected  1326 

fineness  of  the  desired  product 1325 

nature  of  material  crushed    1325 

power  required  for  crushing 1334 

relative  efficiency  of  regrinding  machines. .  1331 

sources  of  lost  power   1325 

free-settling  particles,  method  of  investigation 

of,  in  surface  current  box  classifiers    . .  434 
results  of  investigation  of,  in  surface  cur- 
rent box  classifier   434 

jigging 610,  1460 

bibliography  for 639 

L.  C.  Trent  and  Company 270 

Leach,  A.  H.,  picking  belt  of  steel  wire  screen 492 

Leaching,  bibliography  for 1173 

copper  ores 1 167 

for  wolframite    829 

in  tin  ores 1081 

silver  ores  with  hyposulphite 1167 

Lead  amalgam 730 

separated  by  hot  straining 781 

and  silver  ore,  crushed  by  Blake  breaker  and 

Chili  mill    271 

atomic  weight  of 1188 

bullets  for  jig  bed 1081 

City,  South  Dakota,  mill  at    1025 

cost  of  producing 1960,  1968 

ores,  mill  for  ...  893,  900,  908,  909,  910,  911,  913,  915, 
916,  926,  928,  935,  958,  961,  965,  1004,  1005,  1015, 

1065,  1066 

size  of  grizzly  used  for 340 

treated  at  Mills  24,  25 69 

by  revolving  knife  buddle 329 

removal  of   251 

shot  for  jig  beds    574 

tests  on  velocity  of  626 

-silver  ores,  mills  for 925,  936 

specific  gravity  of   1189 

-zinc  mill,  outline  of  a.    W.  R.  Crane 2041 

ores,  mills  for 1120 

Leadville,  Colorado,  filter  bins  at   1570 

mill  at    909,  910,  1069,  1179 

mining  district.     T.  Tonge 2035 

roasting  for  magnetism  at 814 

Gold  and  Silver  Extraction  Company  mill,  .xxix,  1070 

Leakage  of  magnets  793 

Leather  belts 1093 

Leavitt,  E.  D..  Jr viii 

pump  designed  by 872 

steam  stamp  .  .114,  115,  116,  118,  119,  120,  121,  122, 
123,  124,  126,  127,  128,  131,  132,  133,  134,  142 

at  Mill  177 1892 

mortar  jig 993 

valve  motion    124 

Lebanon  plant  of  the  Pennsylvania  Steel  Company. .  1828 

Le  Chatelier,  decomposition  of  siderite 1544 

Ledoux,  A.  R.,  figures  on  sampling    852 

rules  for  sampling 849 

Leffel  turbine  wheel 916,  939,  1024,  1052,  1053,  1089 


57 


Le  France  Copper  Company,  copper  handbook  ....    1925 
Leggett,   Thomas   H.,   diamond   washing   in   South 

Africa    1178 

pans 335 

weathering  at  Kimberley,  South  Africa    839 

Lehigh  Mountain  ore,  magnetic  separation  of 810 

Zinc  &  Iron  Company,  cost  of  screens 361 

Lehman,  F.,  washing  of  clays  at  Chicago   1178 

Leighton,  George,  dressing  phosphate  in  South  Caro- 
lina        1183 

magnetic  separators    1528 

Lemieres  coal  jig 643 

Length  and  slope  of  trommels 378 

of  amalgamated  plates 740,  744 

jig  sieves    592,  599 

stroke  of  Card  tables  at  mills 1660    1830 

Evans  jigs  at  mills   1837,  1838,  1843,  1844, 

1845 

feeder  at  Mill  125 1700 

Frue  vanners  at  mills  . .  1625,  1627,  1662,  1711, 
1712,  1755,  1844,  1865 

greased  tables  at  Mill  188 1921 

Hancock  jigs  at  mills 1710,  1846,  1869 

Harz  jigs  at  mills 1692,  1693,  1694,  1701, 

1702,    1703,    1725,    1728,    1744,    1750,    1751, 

1752,    1753,    1772,    1773,    1774,    1775,    1829, 

1837,    1843,    1854,    1855,    1869,    1877,    1878, 

1879,  1885 

Hodge  jigs  at  mills  ....  1902,  1903,  1904,  1905, 
1909,  1910,  1911 

jigs    594 

at  mills. . .  1685,  1686,  1707,  1708,  1858,  1929 

Johnston  vanners  at  Mill  167 1858 

mortar  jigs  at  Mill  177    1892 

Overstrom  tables  at  mills 1711,  1712,  1730 

plunger  feeders  at  mills. .  1749,  1750,  1751,  1857 

shaking  feeders  at  mills 1691,  1868 

grizzly  at  Mill  124    1690 

launders  at  mills 1693,  1694,  1761 

simple  steam  stamp  at  Mill  182  .........    1909 

Sutton,  Steele,  and  Steele  dry  table  at  Mill 

151 1803 

Triumph  vanners  at  Mill  101 1627 

vanners  at  Mill  122    1687 

Wilfley  tables  at  mills  .  .  1625,  1633,  1661,  1662, 

1669,    1689,    1729,    1738,    1739,    1744,    1745, 

1754,  1829,  1830,  1844,  1855,  1858,  1894 

Woodbury-Benedict  jigs  at  Mill  177 1893 

concentrators  at  Mill  117    1669 

trommels 349 

units  of 1187 

Lenicque,  M.,  testing  of  ores 2048 

Lepidolite,  specific  gravity  of 1 1 89 

Lester  breaker 56 

Leupold  spitzlutte  . .' 2020 

Leuschner  magnetic  table  separator    2031 

Levant  mill  for  tin  ore 1082 

Levelling  mortar  blocks 147 

up  Wilfley  tables 1468 

Lever  stamps 1246,    1261 

Rapid  Economy 1261 

type  of  Blake  breaker    22 

Leviathan  conveyor  belt    1585 

pulverizer . . . .- 236 

bibliography  of   299 

Lewis  and  Bartlett  bag  houses 885 

J.  V.,  cleaning  corundum  at  Sapphire  and  Corun- 
dum Hill,  N.  C 1184 

corundum  at  Corundum  Hill,  North  Carolina  1176 

heating  and  quenching 57 

Libbey,  W.  L.,  amalgamated  plates   765 

cost  of  milling  in  Nova  Scotia   2049 

sodium  amalgam 753 

Liberty  Bell  Gold  Mining  Company 1631 

mill,  Telluride,  Colo.    A.  Winslow 2033 

Libra  scales 1605 

Lidner,  P.  G 1175 

hand  picking  at  Ammeberg,  Sweden 492 

jigs  in  Sweden 640 

ore  dressing  in  Sweden    1 175 

roasting  a  blende  ore 57 

for  friability 57 

separation  processes 839 

stroke  of  jigs   594 

Liebig  condenser  for  retorts    781 

Life  of  amalgamated  plate    741 

battery  screens  at  mills    1618,  1624,  1632 

belt  conveyor  at  mills 1585,  1631,  1667,  1670, 

1710,  1853 
belts  and  buckets  on  elevators 863,   864 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Life  of  blanket  tables  703 

brass-wire  jig  sieves  at  Mill  173  . .  1877,  1878,  1879 

bucket  conveyor    861 

buckets  in  sand  wheels  at  Mill  117 1668,  1669 

Callow  screens  at  mills 1661,  1662,  1687,  1760 

cam  shaft 190 

canvas,  blanket,  and  carpet  tables 703 

tables    700,  702 

centrifugal  pumps / 870 

chilled-iron  javy  plates  at  Mill  161 1837 

crushing  machinery,  long 2009 

dewatering  wheels  at  Mill  173   1878 

dies  at  Mill  103 1632 

distributors  at  Mill  126 1707 

duck  for  canvas  tables  at  Mill  103   1633 

elevator  belts  at  mills 1632,  1633,  1661,  1667, 

1725 

buckets  at  mills 1632,  1633,  1661,  1667,  1725 

parts  at  Mill  182 1910 

El  Oro  tube  mill  lining 1677 

Frenier  special  sand  pump  at  Mill  126 1708 

Frue  vanner  belts  at  Mill  127    1711,  1712 

grizzlies 340 

Hancock  jig  sieves  at  Mill  127 1710 

Huntington  mill  parts    280 

screens  at  mills   1625,  1686,  1711 

jaw  plates  for  Blake  breakers  at  Mill  100  ...    1624 

jigs  . 604 

jig  screens 546 

sieves  at  mills 1687,  1707,  1708,  1909,  1910, 

1911 

Koppel  shoes  and  dies  at  Mill  97   1620 

linoleum  top  and  riffles  of  Overstrom  table  at 

Mill  127   1711 

Midvale  steel  roll  shells  at  mills. . .  1727,  1866,  1867,  - 

1877 

open-hearth  crucible-steel  screens  at  Mill  178    1896 
punched  plate  trommel  screens  at  mills. .  1707,  1876, 

1877,  1902 

retorts 782 

Robins  belt  conveyors  at  mills..  1661,   1824,   1825, 

1876 
conveying  and  picking  belts  at  Mill  132  ...    1727 

roll  shells   66 

at  mills 1688,  1689,  1720,  1724 

sand  wheels   866 

screens 174 

shoes  and  dies 182,  183,  184,  2011 

at  mills 1622,  1632,  1668 

for  gravity  stamps 1277 

sieves  on  Hancock  jigs 1441 

stamp  cams    192 

guides   156, 

screens 169,  170 

stem 187,    188 

tappets    189 

trommel  screens  352,  362 

at  mills  ....  1710,  1727,  1728,  1749,  1750,  1751, 

1752 

tube  mill  linings  at  Mill  103 1632 

vanner  belts  648,   650 

wash  trommel    332 

wearing  parts  of  Allis-Chalmers  rolls  at  Mill 

179 1898 

ball  mills  at  Mill  159 1828 

Blake  breakers 27 

at  mills 1621,  1724,  1749,  1853 

breakers    1221 

Bryan  mills  at  Mill  173 1879 

Buchanan  jaw  breakers  at  Mill  157   1818 

Butler's  centrifugal  pumps  at  Mill  11 7..  1671, 
1672,  1674 

Byron- Jackson  pump  at  mills 1662,  1673 

centrifugal  pump  at  mills 1632,  1633,  1711, 

1712,  1856,  1899,  1904,  1905 

Chili  mills 1898 

Cyclone  beater  at  Mill  186 1917,    1918 

dewatering  screen  at  Mill  126    1708 

Dodge  breakers 31 

drag  or  disc  conveyors 1583 

elevators  at  mills. .  1707,  1710,  1711,  1727,  1728, 

1729,   1749,   1750,   1752,   1753,   1755,   1756, 

1818,   1819,   1829,   1853,   1854,   1855,   1877, 

1880,  1898 

Forster  breaker 28 

Prayer  centrifugal  pump  at  Mill  159    ...    1829 

Gates  breaker  at  mills.  .1661,  1706,  1716,  1727, 

1828,  1853 

Griffin  mills  at  Mill  105    1636 

grinding  pans  at  Mill  105 1638 


Life  of  wearing  parts  of  Hodge  and  Cleaves  sand  jigs 

at  Mill  182 1910,  1911 

jigs  at  Mill  180 1902,  1903,  1904,  1905 

Huntington  mills 1317 

at  mills 1669,  1687,  1689,  1711,  1753 

Knowles  duplex  vacuum  pump  at  Mill 

117   1673,  1674 

Krogh  pumps  at  mills 1626,  1633 

McCully  breakers  at  Mill  139 1222,  1749 

Monadnock  Chili  mills  at  Mill  144 1775 

Nordberg  steeple-compound  steam  stamps 

at  Mill  180    1901,  1902 

rolls  at  mills 1244,  1685,  1686,  1707,  1710, 

1749,   1750,   1751,   1752,   1771,   1773,  1774, 

1854 

scraper  convey9r  at  Mill  126   1709 

Sherman  Huntington  mills  at  Mill  132  .  .  1728 

spindle^breakers 46,  47 

stamps  at  Mill  118 1677 

Traylor  centrifugal  pumps  at  Mill  114  ..  1662 

trommels  at  Mill  166 1853,  1854,  1855 

Waddell  Chili  mills  at  Mill  174 1886 

Wetherill  magnetic  separators 1525 

Wilfley  tables  at  Mill  126 1708 

wire  rope    1095 

Lifting  magnets,  Eastwood  improved 1532 

Lift  of  elevators 863 

Light  for  hand  picking    481 

Lighting   1100 

mills 1931 

Lightner  mill 235 

bibliography  for 296 

Lignite  as  fuel  for  roasting  furnace 1549 

Lime.     See  also  Quicklime. 

as  a  precipitant  for  slimes 1416 

crust  on  plates 767 

for  acid  water    1 105 

coagulating  slimes  at  Mill  185. 1915 

settling    458,   459 

slimes    1026 

at  Mill  106    1416,  1641 

Caldecott  on 1416 

in  Arizona  copper  mills 1416 

used  in  amalgamation   751 

investigating  classifier  currents 434 

settling  tests 1147 

slimes    1149 

to  remedy  acidity  in  stamp  mill     749 

Limestone,  Missouri,  jaw  plates  used  in  crushing   . .  48 

Limestone  to  remedy  acid  water 751 

strength  of 301,  302 

weight  of 1190 

Limit  of  concentration 1118 

crushing   303 

hand  picking  tests 1164 

screen  sizing 1361 

settling    455 

sizes  treated  by  jigs   604 

Limits  of  drop  in  stamps 216 

sieve  scale    368 

to  number  and  height  of  drop  of  stamps 218 

Limitations  of  the  hydraulic  classifiers   1368 

Limonite.     See  also  Iron. 

concentrated  by  Bradford  jig 502 

concentration  of 1054 

magnetic  separation  of 809 

results  of  classifying  in  Mill  5   405 

separated  by  magnets 790 

specific  gravity  of   1189 

washer xxv,  895,  896 

weight  of 1190 

Lincoln  mill,  dies  used  in 180 

Linder,  S.  E.  and  H.  Pictou,  action  of  arsenic   sul- 
phide solution  on  electrodes   1178 

powers  of  metallic  salts  on  arsenious  sul- 
phide   ^ 1178 

Lindgren,  W,  amalgamating   pans,    Boss  system   at 

Calico,  California    290 

placer  mining 2041 

Liners,  El  Oro  tube  mill 1286,  1291,  1340 

cost  of 1287 

Lines  of  force,  magnetic   791 

Lining,  discussion  of  iron  tube  mill 2016 

for  Abbg  tube  mills  at  Mill  101 1626 

amalgamating  pan    244 

cars 1113 

centrifugal  pumps 869 

gravity  stamp  mortars   166 

jigs 527 

launders    872 


58 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Lining  for  ore  bins 842 

steam  stamps 120 

tube  mills.     A.  E.  Drucker 2016 

at  Bodie,  Calif.    W.  W.  Bradley 2016 

Mill  103 1632 

Link  belt  conveyors   860 

Company  elevator  at  Mill  125   1702 

elevators 862 

Linkenbach,  C xx,  332 

Blake  breakers 56 

breakers  and  hammers 56 

bumping  tables  and  slime  tables    727 

capacity  of  trommels    359 

classifier  feed 389 

spigot 388 

cobbing 480 

concave  slime  tables 692 

density  of  pulp  for  slime  tables   695 

drop  between  jig  sieves   550 

figures  on  limits  of  sieve  scale    369 

spiral  screen 363 

gravity  stamps 223 

hammers  for  breaking   11 

hand  breaking  and  picking 492 

Heberli  mill 259,  292 

jig  discharges 583 

plungers 529 

jigs  for  two  mineral  separation 589 

labor  for  jigs   604 

life  of  jig  screens 547 

limit  of  screening    369 

sizes  jigged    605,  606 

Linkenbach  slime  table 728 

magnetic  separators   * 832 

mill  schemes 1 173 

number  of  sieves  for  jigs 590 

pointed  boxes 412,  416,  441,  476 

power  for  crushing 315 

ratio  of  sieve  hole  to  jig  feed 573 

rolls  109 

roll  speeds    87 

Schmidt  spiral  screen 363 

sieve   scale,    grizzlies,    trommels,    and   spiral 

screens 384 

sizes  treated  by  slime  tables 693 

skimming  jigs    576 

slime  tables    697 

slope  of  jig  sieves   548 

slime  tables    694 

spalling  and  cobbing  hammers 11,  56 

stroke  of  jigs   594 

use  of  box  classifiers 433 

V-box  classifier   421 

velocity  of  current  in  classifiers    434 

wash  trommel    334 

fixed  conical  tables  689 

slime  table   690 

tables  at  Mill  146 1785 

Mill  147  1790 

Linnaeite,  specific  gravity  of 1189 

Linoleum  cover  for  deck  of  New  Standard  concen- 
trator    1479 

table  decks 1467 

Wilfley  table 672 

Linton's  level 1159 

Lintorf,  Prussia,  disintegration  and  screening  at  ....  830 

jigs  at 641,  642 

limit  of  sizes  jigged  at 605 

mill  at 1177,  1179 

stroke  of  jigs  at 594 

Vapart  disintegrator  at 289 

Lion  mill    234 

bibliography  for 294 

Lip  apron  for  stamps 178 

plates 739 

Liquation  in  bullion 785 

Lisburne  mines,  Wales 329 

List  of  minerals  floated  by  flotation  processes 1555 

List  of  good  and  poor  conducting  minerals  for  electro- 
static separation    1550 

Liter,  equivalents  of     1187 

Lithium,  atomic  weight  of 1188 

Little  Giant  quartz  mill    1281,  1310 

Lixiviation 1616,  1676 

bibliography  for 1175 

Loam,  M.,  Husband  stamp    143 

Location  of  amalgamated  plates    737 

machines  in  mills    1 109 

main  shaft  for  stamps 197 

mills xxv,  1085 


Lock,  A.  G.,  amalgamating  pans 290 

amalgamation    787 

breakers    56 

Dunham's    and    Patterson's    spring    stamps, 

Shell's  penumatic  stamp   143 

Fisher's  stamp  mill 142 

Frisbee  Lucop  mill 294 

gold  xx 

from  sands  and  from  vein  rock   1173 

gravity  stamps 223 

Harz  and  Bradford  jigs 639 

Rowland  pulverizer    297 

Jordan's  pulverizer 299 

placer  gold  concentration 837 

pointed  boxes,  spitzlutte ...    . ' 476 

several  breakers 56 

Thompson's  pulverizer .  294 

C.  G.  W.,  gold  milling xx 

milling  in  Black  Hills,  South  Dakota  1182 

pan  amalgamator    789 

stamping,    amalgamating,    and    concentrating 

gold 1173 

Locke,  C.  E viii,  477 

Lockhart's  automatic  gem  separator  (classifier)    430 

tubular  classifier   476 

Loevy,  J.,  definition  of  slimes    1398 

Logarithmic  plot  of  sizing  tests 1139,  1144 

Log  washers 55,  320,  1065 

at  mills 895,  1617,  1815 

bibliography  for 334 

Crickboom,  at  Mill  147 1787 

horizontal  logs 328 

Thomas  324,  335 

Turbo 1341 

•versus  wash  trommels 333 

washing  plant    335 

at  Longdale,  Virginia 335 

Lohnert's  ball  mill    293 

Longdale,  Virginia,  limonite  washer  at    896 

log  washers  at 335 

mill  at 1175 

classifier  at  Mill  155 1369 

Iron  Co.,  clarifying  reservoir    461 

mill   1816 

reservoirs  for  tailing 477 

log  washer   322 

Longfellow  concentrator,  water  required  at 1931 

Longitudinal  partition  for  jigs   524 

Longridge,  C.  C.,  gold  dredging  in  rivers  1179 

hydraulic  mining xx,  1006,  1173 

probable  development  of  stamps   229 

river  dredging   2036 

Long  ton 883 

equivalents  of 1 187 

Loram,  S.  H.,  amalgamating  pans    788 

Lord  &  Banfield,  dry  placer  machine    839 

dry  separator 2030 

Loring,  recovery  of  waste  in  stamp  mill 266 

vanner  belt    647 

W.  J.,  amalgam  at  the  Utica  mills    788 

amalgamated  plates    757 

gravity  stamps 224 

life  of  steel  shoes 184 

mercury  led  to  stamps 208 

mortar  linings 166 

stamp  mills  at  the  Utica  stamp  mills,   Cali- 
fornia   1176 

stamp  mill  practice  in  California 2033 

shoes 181 

Loss  in  friction   1098 

melting   784 

steam  transmission 1091 

weight  in  retorting    783 

wire  rope  transmission 1095 

of  gold 786 

mercury.    See  Individual  Gold  mills  in  Chap- 
ter XX. 

mercury 786 

at  Mill  114 1663 

in  amalgamating  pans 250 

oil  in  separation    '.  831 

Losses  in  concentration 892 

dry  concentration   825 

fines 1H9 

magnetic  concentration    1054 

milling 1945 

plate  amalgamation    749 

slimes    1121 

stamping  pyrite  ores 1047 

tailings 1171,  1172 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Losses  of  iron  and  mercury  in  pan  amalgamation. . .     249 

on  amalgamated  plates 747 

slime  tables 693 

vanners  656 

Louis,  H 142,  167,  200,  839 

amalgamated  plates 735,  747,  750,  753 

amalgamation    787 

amalgams  731 

arrastra    238,  290 

Blake,  Dodge,  and  Gates  breakers    56 

Chinese  stamping  machine   224 

connecting  table  with  mortar   735 

crushing  machines 316 

design  of  cams 197 

economy  of  stamp  blow 220 

efficiency  of  stamps 219 

gold  milling   xx 

gravity  stamps 223,  224,  226 

grizzlies 384 

hammers  for  breaking   11 

Huntington  mill 297 

Krom  rolls 109 

mercury  wells 768 

nature  of  amalgam 208 

pointed  boxes 476 

power  for  stamps 204,  205 

retorting   781 

size  of  stamp  feed 207 

spring  and  pneumatic  stamps 143 

stamp  frames 153 

mortars  164 

stems 187 

tappets    188 

stamping,   amalgamating,    and    concentrating 

for  gold 1173 

tables  for  supporting  plates 733 

use  of  sulphuric  acid  on  plates 752 

water  used  in  stamp  mills 222 

weight  of  stamps 219 

Lovett-Finney  magnetic  separators 832,  833,  835 

Lowe,  F.  A.,  amalgamating  pans  at  Batopilas,  Mex- 
ico       291 

concentration  of  silver  lead  ores 1922 

stamp  mill  at  Silver  Islet  mill,  Lake  Supe- 
rior   226,  1179 

Lowe's  mill 233 

bibliography  for 294 

Lowry  breaker   58,  59,  60 

National  breaker 45 

Lubrication    1097 

and  care  of  journals 1930 

of  amalgamating  pan 247 

cams    194 

cam  shafts 191 

stamp  guides   1 56 

wire  rope    1095 

Lucknow,  New  South  Wales,  mill  at    1 181 

plates  at   788 

Lucop  &  Cook  mill 294 

Ludlow,  E.,  report  used  by  Choctaw  Coal  and  Rail- 
way Company 1 180 

Ludlow-Saylor  Wire  Company,  wire  cloth  screens  . .    1366 

Ludwigseck  mine,  magnetic  concentration  at    837 

Luhrig  and  Coppee  coal  washing  plant 2051 

Buss  concentrating  table 1492 

jig 538,  640 

scraper  for  removing  tailings    588 

picking  table.     C.  Blomeke 2021 

slimer    1496 

table 

670 
1734 
1717 
295 
1645 
1125 


capacity  of  at  Diepenlinchen,  Prussia 

type  tables  at  Mill  134 

vanners  at  mills , 

Luhrmann,  F.  W.,  Pfeiffer's  mill 

Luipaards  Vlei  Estate,  ore  reduction  plant  of 

Lumber  for  mills,  cost  of    

Luquer,  L.  M.,  minerals  in  rock  sections    xx 

separation  of  minerals  by  solutions 1173 

Lurmann,  separation  processes 836 

Luster  affecting  separation   889 

of  minerals,  effect  of 3 

Luting  retorts    781 

Luttermann,  rolls  at  Clausthal 110 

Lye,  use  of  on  amalgamating  plates  in  California    . .  1619 

used  in  amalgamation    751 

Lyon  mill,  amalgamating  pan 241,  243,  244,  246 

heat  used  in  amalgamating  in    248 

wings  of  amalgamating  pans  in 245 

Mountain,  Conkling  jig  at 503 

mill  at 901,  1175,  1185,  2035,  2039 

methods  at  the . .  2046 


M 

Mace  mill 1685 

Machine  breakers  13 

breaking 55 

distributors 857 

oil 1098 

shop  for  mill    1Q87 

Machinery  at  Paris  Exposition,  exhibition  of 2009 

Reichenberg  Exposition,  exhibition  of 2010 

cost  of 1 123 

crushing  and  grinding.     Philip  Argall    1278 

principle  and  operation  of  crushing  and  grinding. 

James  Douglas    2017 

Machines,  arrangement  of 1107 

design  of 1096 

guarding  work  of    nil 

in  series  and  in  parallel 1110 

Macquisten,  A.  P.  S.,  notation  process 1555   1563 

flotation  process.     W.  R.  Ingalls 1569,  2027 

at  Golconda,  Nevada 1555,  1565,  1611 

Mill  149 1564 

Coates  tubes 1563 

water  flotation  process.    F.  C.  Nicholas    2046 

Mactear,  J.  A.,  penumatic  concentration 838 

Madison  mill  1024 

of  the  Utica  Company xxvii 

Madrid,  New  Mexico,  electric  power   1092 

Magalia  drift  mill,  plates  in 789 

riffles  in 770 

Magic  crusher 236 

bibliography  for 299 

Magnesite,  specific  gravity  of 1189 

Magnesium,  atomic  weight  of    1188 

Magnet  for  testing    1 156 

Magnetic  combination  mills   1060 

concentrating  mills 1053 

concentration 790 

at  Broken  Hill 1569 

Canon  City,  Colorado.     P.  Barker 2043 

Monteponi,  Italy.    E.  Ferraris 2046 

cost  of 1135 

principles  of  magnetic  separators 1521 

roasting  before 1544 

the  Hibernia  mill,  New  Jersey 2040 

field  791 

attractability  of  substances  in 796 

mill  at  Lyon  Mt 2035 

Monteponi   1068 

ore,  Port  Henry,  products  of  crushing    100 

separation.     See  also  Roasting  for  Magnetism. 

at  Broken  Hill,  Australia 2034 

D.  Clark 1568 

Creede,  Colorado    2044 

mills 1663,  1735,  1741,  1793,  1810 

Mineville,  N.  Y 2040,   2047 

Port  Henry,  N.  Y.    F.  Cirkel   2034 

the  Joplin  Separating  Company  mill 2038 

Krupp  mining  administration 1814 

London  mill,  Australia 2045 

bibliography  for 832 

H.  Lunto    2030 

H.  Smits 2026 

history  of.     Witter   2031 

F.  T.  Snyder 1568 

in  Cornwall.     E.  Skewes 1037 

Finland.     G.  Grondel   2047 

Hungary,  dry  and  wet.     C.  Blomeke 2040 

Sweden 2047 

K.  G.  Brunnberg 2040 

of  hematite  and  magnetite.    Dr.  Weiskopf . .  .  2047 

iron  ores  in  Sweden.    G.  W.  Peterson 2047 

tin  oxide  and  wolfram 2027 

and  copper  ores  in  Cornwall 2040 

and  wolfram.     E.  Treloar  and  G.  John- 
son     2028 

zinc  iron  sulphides.    G.  H.  Elmore   2042 

ores  in  Wisconsin.    H.  A.  Wheeler 2042 

references  to 2028 

review  of.    H.  Wedding  2028 

roasting  zinc  ores  for 2030 

versus   notation    process    for    zinc   ores.     E. 

Laughton   2029 

with  Wetherill's 804 

separators  at  London  mill,  Queensland,  Australia  2042 

mills. . . .  1741,  1763,  1765,  1808,  1810,  1815,  1862, 

1863,  1891,  1916 

Monteponi.    E.  Ferraris 2028 

Balch 834 

Ball-Norton 1527,  1923 

or  Monarch 797 


60 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Magnetic  separators,  Blake 833 

Bromilow 836 

Buchanan 803 

C.  Blomeke 2026 

Chase    832,  833,  835 

classification  of 796,  1521 

Cleveland-Knowles  magnetic  separator 1542 

at  Mill  148    1792,  1793 

cobbing  magnets  1531 

comparison  of.     W.  A.  Anthony   2026 

Conkling 809,  810 

construction  of 2030 

Cranberry  magnet 1530 

Dellvik  Grondal 804 

description  of  different  types  of.     C.  Bugge  . .   2030 

Dr.  Weiskopf 2030 

H.  C.  McNeill 2026 

M.  Lenicque 2026 

O.  Simmerback 2030 

S.  W.  Osgood 2027 

Dings 1540 

Edison 810,   812 

Eriksson's  electromagnetic  separator 1529 

F.  Schiff..... 2028 

Ferraris 799,  1525 

drum-type 1528 

for  black  sands.    C.  C.  Longridge 2028 

Forsgren's  electromagnetic  separator 1538 

full  description  of  different  types  of    2028 

Grondal  Nos.  2,  3,  4,  and  5 1537 

Heberli   799 

wet 810 

Hoffman 832,  835 

Hughes  Daviot 812 

Humboldt 1530 

in  a  lead  zinc  plant 2047 

Cornwall 2028 

International    1533 

Kessler    811 

Knowles'  New  Century 1541,  1568 

Leighton 1528 

Lovett-Finney 832,  833,  835 

Mechernich    1535 

Payne   799 

primary-magnet  type    1521 

principles  of 1521 

Rowand    807 

secondary  or  induction  magnet  type 1521 

Siemens    803,  834 

&  Halske 798 

suited  for  testing 1993 

theory  and  conditions  of.    E.  Langguth 2031 

Trustedt 835 

Ullrich 1535 

used  at  Przibram 812 

Monteponi   810 

using  drums 797 

Vial 835 

Waring  at  Mill  148 1792 

Wenstrom 800 

wet 804,  810 

Wetherill    804,  1521 

with  conveying  belts 804 

no  moving  parts.     O.  A.  P.  Srufeldt 2026 

ore  falling  in  front  of  magnets 812 

treatment  of  a  high  phosphorus  iron  ore 2047 

blende  and  barite.     C.  Blomeke 2025 

iron  ore  in  Sweden.     G.  W.  Peterson 2038 

by  the  Grondal  process.     P.  McBennie  . .  .   2025 

Magnetism 891,  1053,  1611 

calcining  for 1544 

change  of  by  heat 4 

effect  of 4 

carbon  in  roasting  for    1544 

on  free  settling 465 

roasting  for 813,  890,  1544 

a   blende-marcasite  concentrate  for.     H.  O. 

Hofman 2027 

F.  H.  Trego 1568,  2027 

N.  S.  Keith 2027 

W.  B.  Phillips  2027 

unit  of 791 

use  made  of,  in  mills 890 

Magnetite,  concentrated  on  Conkling  jig 503 

deposits  of  New  York    1923 

for  jig  bed    574 

hindered-settling  test  on 617,  618 

mill  for 1055,  1058,  1059 

ores,  mills  for 901 

separated  by  magnets 790 


Magnetite,  separation  of  in  Finland 804 

settling  velocity  of    466,  469 

specific  gravity  of 1 189 

Magnetomotive  force 792 

Magnets.     See  also  Electromagnets. 

Bilharz  cobbing  magnet 1532 

Broughton  Asbestos  Company  magnet  1532 

cobbing 1439,  1531 

Eastwood  improved  litfing  magnet    1532 

heating  of 795 

leakage  of 793 

Manhattan  Asbestos  Company  magnet 1531 

of  Wetherill  separator,  proper  distance  apart  for  1524 

relative  attraction  of  various  substances 796 

when  applicable 790 

Mahanoy  City,  shaking  screens  for  coal 342 

Maiern,  Austria,  hand  picking  at 487,  493 

magnetic  separator  at 798,  836 

mill  at 1 185 

roasting  for  magnetism  at 815 

Main,  Wm.  Jr.,  gravity  stamps 226 

stamps 229 

shaft  for  gravity  stamps 197 

location  of    197 

Maintaining  height  of  drop  in  gravity  stamps 200 

plates  of  the  right  consistency 756 

Malachite,  specific  gravity  of   1189 

Malay  Peninsula,  tin  dressing  in 1084,  1182 

Malleable  iron  elevator  buckets  at  Mill  136  ....  1737,  1738 

Mallet  for  settling  concentrates 1113 

Mammoth,  Arizona,  screening  tests  on  gold  ore  at    .  284 

shoes  and  dies  at    183 

mill,  screens  in    175 

Mining  Co.,  mill xxviii,  1045 

Utah,  mill  at   1045 

Management   1947 

effect  on  costs    1128 

Manganese,  amalgam 730 

atomic  weight  of 1188 

ore,  the  dressing  of.     E.  K.  Judd '. 2027 

specific  gravity  of   1 189 

steel.     See  Wearing  Parts. 

ball  mill  linings  at  Mill  159   1828 

for  breakers 1213 

drag  conveyor  flights 1583 

roll  shells    68 

toothed  rolls 1244 

wearing  parts  of  rolls 1243 

Gates'  gunlock  mantles  for  gyratory  breakers.  1220 

jaw  plates  at  mills   1749,  1818,  1888,  1889 

self-tightening  mantles  for  McCully  gyratory 

breakers  1213 

trommel  screen  at  Mill  117 1667 

Mill  174  1882 

wearing  parts  of  Blake  breakers  at  Mill  98  . .  1621 

Buchanan  breakers  at  Mill  183   1913 

Gates  breakers  at  Mill  114 1661 

Manganite,  specific  gravity  of 1189 

Manhattan  Asbestos  Company,  magnet 1531 

mill,  Krom  jigs  at 838 

Mannheim,  Brink  &  Hubner  disintegrator  at 286 

Mantey  offset  for  Chili  mills 1305 

Mantles  for  McCully  gyratory  breakers,  self-tighten- 
ing, manganese  steel 1213 

Gates'  gunlock    manganese   steel    for  gyratory 

breakers    1220 

Marcasite,  roasting  for  magnetism 1544 

specific  gravity  of   1189 

Mardin,  E.  M.,  amalgam   789 

Marsaut,  J.  B.,  jigging  plants    641 

separation  by  jigs 643 

Marsden  breaker 56,  58,  59,  60 

Marshall  Basin,  Colorado,  Browne  hydrometnc  sizer  at  410 

vanners  at 658 

Creek 1015 

Martin  Iron  Works  breaker   2009 

Martin's  buddle 1090 

Maryland,  mills  in   1175 

Mining  Company  mill xxvii,  1019 

Marysville,  Montana,  Blanton  cams  at 194 

mill  at 1027,  1040,  1181 

Massachusetts  Institute  of  Technology,  testing   ma- 
chines at    1137,  1156 

tests  on  distribution  of  amalgam 764 

effect  of  temperature  on  amalgamation  . .  767 

Materials  for  amalgamating  plates    747,  1514 

drag  or  disc  conveyor  flights 1583 

gravity  stamp  guide  blocks 1267 

grizzly  bars      • 339 

Harz  jig  bedding  at  Mill  183 1913 


61 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Materials  for  Huntington  mill  parts 280 

jig  tanks 522 

screens 574 

mortar  linings    166 

riffle  cleats   1467 

roll  shells     66,  68 

at  mills 1716,  1720,  1913 

round  table  decks  at  Mill  162    1846 

screens 354 

and  cost   173 

in  trommels   350 

shafts 351 

stamp  batteries    1^77 


guides    

parts    

at  Mill  143  . . 


155,  156 

.     225 

1769 

tappets    188 

surface  of  Rittinger  table 668 

of  slime  tables  688,   695 

tube  mill  linings    1287 

wearing  parts  of  Blake  breakers    26 

at  Mill  166 1853 

breakers  48,  1220 

centrifugal  pumps  at  Mill  103   . . . 1632,  1633 

Cyclone  beaters  at  Mill  186  1917,  1918 

Dodge  breakers 31 

at  Mill  183 1913 

elevators  at  mills..  1822, 1824, 1825, 1853, 1854, 1855 

fans  at  Mill  186 1917,  1918 

Gates  breakers  at  Mill  166 1853 

Hodge  and   Cleaves  sand    pumps    at    Mill 

182 1910,  1911 

Huntington  mills  at  Mill  161 1839 

McCully  breakers  at  Mill  139    1749 

Nordberg  steeple-compound  steam  stamps 

at  Mill  180    1901,  1902 

rolls 1243 

at  Mills....  1737,  1738,  1742,  1743,  1843,  1844, 

1854 

screens  at  Mill  158 1824 

spindle  breakers 46,  47 

steam  stamps 121 

trommels  at  Mill  165 1851 

Waddell  Chili  mills  at  Mill  174 1886 

of  belts  for  gravity  stamps    197 

bottom  bed  on  "jigs  573 

bucket  elevators 863 

cam  shaft 191 

dies   180 

jig  screens 545 

mortar  blocks 145 

screens 169,  170 

shoes  and  dies 182,  183,  184 

stamp  cams    192 

screens 173 

stem 187 

tappets    189 

Mathet,  De  Gournay  and  Suisse,  Hochstrate  appa- 
ratus  ' 837 

Mathey  roasting  furnaces  at  Mill  148 1792 

Mathez,  A.,  on  drop  of  stamps    220 

Mathines  Creek,  Huntington  mill  at 281 

Maurice,  P.  E.,  jigs 642 

motion  of  solid  particles  in  a  liquid 477 

centrifugal  coal  washer,  results  from 2050 

Maximum  profit  in  concentration   1118 

size  of  feed  to  rolls 63 

ore  treated  by  Wetherill  magnetic  separator   .   1525 

Maxwell's  law  of  magnetic  field 791 

May  Brothers'  jigs  at  mills    1714,  1717,  1720 

W.  J.,  close  sizing  before  jigging 2022 

concentrating  iron  ores 1179 

Mayflower  drift  mill,  mercury  wells  in 789 

riffles  at 770 

mill,  amalgamated  plates  in 740,  752 

pan  concentrator  at    683 

shaking  screen  in    342 

unwatering  box  in 450 

Maynard,  G.  W.  and  W.  B.  Kunhardt,  dressing  of 

iron  ores  1185 

jigging  tests   643 

May's  jig   643 

McCabe  &  Company,  New  Standard  classifier 1373, 

1419 

McCallum,  A.  C.,  design  of  mining  machinery 2048 

rolls,  crushers  and  mortars 1178 

strength  of  machines    1096 

McClave,  J.  M.,  an  electrostatic  separator    2028 

the  Wilfley  roaster 1569 


McCormick,  E.,  Calumet  and  Hecla  mill  scheme    . .    1184 
S.  G.,  gold  ores  at  Ouro  Preto  mine,  Brazil.  .  .  .    1182 

McCully  breaker 55-59,  2010 

compared  with  Gates 45 

gyratory  breaker 44,  1210 

at  mills 1222,  1749,  1805,  1831,  1866 

life  of  wearing  parts  at  Mill  139    1222 

manganese  steel  self -tightening  mantle  for  .    1213 

McDermott,  W 1362 

amalgamated  plates    741 

and  P.  W.   Duffield,    amalgamated    shaking 

plates 787 

gold  amalgamation xx,  1 173 

Baltic  mill,  Michigan 2041 

capacity  of  Calumet  classifier 401 

concentration  and  amalgamation  of  silver     . .    1175 

Eureka  Hill  mill 2029 

hand  concentration  test 2049 

standardization  of  screens 2019 

tin  dressing  in  Bolivia   2040 

McDonald,  B.,  Browne  hydrometric  sizer 410 

double  discharge  209 

gold  stamp  mill  at  Gibbonsville,  Idaho    . .    . .    1181 

mining  report xx 

screens 175 

size  of  stamp  feed    207 

stamps  at  Gibbonsville,  Idaho 227 

weights  of  ore    1190 

before  and  after  crushing    1174 

McDougall  type  roasting  furnace 1546 

McDowell,  F.  H.,  concentration  at  the  Tilly  Foster 

mine    . . : 833 

Conkling  separator  at  the  Tilly  Foster  mine     833 

Tilly  Foster  magnetic  plant    1175 

McFarlane  &  Co.,  design  of  cams 196 

Manufacturing  Company,  parallel  rolls    1244 

mortar  bolts  150 

parallel  rolls,  description  of 1232 

rolls 72,  76 

at  Mill  142    1766,  1767 

stamp  frames 153 

McKenna  Brass  Company,  laboratory  ore  grinder  . .    1285 

laboratory  ore  grinder    1279,  1285,  1323 

McLanahan  and  Stone  Company,  iron  ore  and  phos- 
phate washing 1244 

log  washer    324 

single-roll  crusher  at  Alleghany  Ore  and  Iron 

Company    1241 

International  Phosphate  Company  .  .    1241 

description  of 1241 

table  of  sizes,  power  and  weights 1241 

jig    518,  538,  640 

McLeod  concentrator 1492 

table,  tests  at  Mill  162 1493 

McNeill,  H.  C.,  magnetic  separators  and    plants   in 

Sweden 835 

Means  of  getting  a  whole  current  in  settling  tanks.  .  .     451 

Measure,  miners'  inch 1 197 

Measurement  of  mineral  particles 1996 

ore  grains 470 

screen  openings  . 1362 

Measures  of   a   four-spigot   hydraulic   classifier  with 

sorting  column  of  3-inch  pipe 403 

tables  of  1187 

Measuring    1 160 

Mechanical  batea   683 

cobbing  devices  1439 

efficiency  of  sand  wheels 1587 

ore  handling  Blaisdell  system 1600 

samplers 1571 

Brunton    1572 

oscillating 1575 

Lamb  automatic  tailings  sampler 1573 

Snyder 1572 

Vezin 1572 

sampling 846 

Brunton  sampler 847 

cleaning  mill  between  tests 1577 

Collom  sampler 847 

comparison  of  machines 848 

difficulties  attending 1575 

limit  of   1577 

moisture  samples 1575 

principles  of 1574 

requisites  to  accuracy  in 1575 

size  of  samples 1575,  1576 

winnowing  effect  of  air  currents 1576 

shovel  for  removal  of  jig  tailings 588 

squeezer  for  amalgam    781 

stirring    320 


62 


Pages  1199-1610,  Vol.  III.  INDEX. 

Mechanical  trippers  for  discharging  conveyor  belts  . .    1586 

unwatering 879 

Mechanism,  accelerated,  in  jigs 533 

crank  arm 535 

for  Bartlett  table    678 

bumping  tables   680 

Cammett  table 677 

jigs 510,  511,  517,  519,  534 

vanners    646,  651,  652,  655,  657 

Wilfley  table 672 

sliding  block 533 

Mechernich,  classifier  at    477 

Heberwasche  at 421,  478,  520 

Jigs  at. 642 

magnetic  separator WM 

at  Mill  135    1536,1736 

1176 

2030 

..  2031 
.  367 


Pages  1611-2052,  Vol.  IV. 


mill  at 

process  in  the  Harz 

separator,  results  from  the . 

sieve  scale  at   

stroke  of  jigs  at 

Megraw,  H.  A.,  slimes 

Meier,  E.  D.,  Osterspey  jig  . . 

J.  W.,  automatic  feeders  at 


Dingey  mill 
Heberlimill 


Przibram  .... 


1419 
642 


293 
292 
670 
1180 
492 


Luhrig  table 

ore  dressing  at  Przibram 

revolving  picking  table  and  picking  belt 

Rittinger  and  Salzburg  tables  and  buddies  at 

Przibram,  Stein  belt  concentrator   729 

Schranz  mill 296 

wash  trommel    335 

Meihe's  pulverizer 236 

bibliography  of   299 

Meinecke  classifier 430,  477,  478 

work  of 461 

pointed  box  at  Clausthal 477 

spitzlutte 425,  477 

stamps  at  Clausthal   225 

Melones  Mining  Co.  mill,  Melones,  California.      W. 

W.  Bradley 2044 

Melting  bullion 784 

Men.     See  also  Labor. 

Mercadel,  magnetic  separation  at    835 

Merced  amalgamated  plates  at 767 

Mercury,  absorption  of  by  amalgamating  plates  ....  1514 

action  of 4 

amount  required  to  amalgamate  copper  plate  . .  753 

antidote  for    730 

atomic  weight  of 1188 

bibliography  for 787 

care  and  purification  of 785 

effect  of  heat  on  cohesion   767 

fed  to  gravity  stamps  208 

mortars  at  mills 1620,  1640 

for  stamps    206 

gold  in,  after  retorting 783 

after  straining 781 

in  amalgamating  pan 249 

riffle  boxes   724 

riffles  770 

loss  of.     See  Individual  Gold  Mills  in  Chapter  XX. 

loss  of 786 

lost  in  pan  amalgamation   249 

ore,  separated  by  oil 831 

mill  for 1074 

properties  of 730 

retained  in  retort  residue 786 

sickening  and  flouring   751 

sink  for  clean-up 266 

specific  gravity  of   1 189 

sprinkler  for 760 

traps  768,  771,  1516 

Black  Hill  trap   773 

box  traps    773 

cleaning  up 774 

Grass  Valley  trap ¥ 774 

lined  with  plate * 741 

plain  transverse  troughs  or  riffles 772 

position  of    737 

transverse  with  gates    772-773 

use  and  care  of 2024 

used  on  dredges 1012 

weight  of  column 1188 

wells    768 

versus  plates 771 

Meronitz,  Bohemia,  weathering  garnet  rock  at.. 831,  839 

Merrall,  individual  mortar    1264 

Mill  Company,  Men-all's  stamp  mill 1278 


Merrall  mill    234 

bibliography  for 296 

Merrill,  C.  W.     . 1408 

cyaniding  at  the  Homestake  mine 1419 

tailings    of    Montana     Mining    Company, 

Marysville,  Montana    1181 

effect  of  temperature  on  amalgamation 1520 

metallurgy  of  the  Homestake  ore 1419 

treatment  at  the  Homestake  mills 2044 

cone  classifiers  at  Mill  104   1634 

cones  at  Mill  106   1371 

cylindrical  clarifying  tanks    1406 

at  Mill  106 1642 

definition  of  slimes 1399 

filter  press  at  mills' 1635,  1642 

large  cone  classifiers . .  1406 

at  Mill  106 1640 

slime  cones,  finishing  cones,  and  water  cylinders  1367 

small  cone  classifiers 1371 

at  Mill  106 1641 

Merrill's  mill 1310 

Mesabi  iron  ores,  washing  plant  for   1815 

ores,  concentration  of.     H.  H.  Stock 1344 

Meshes  in  screens,  values  of 1196 

Mesquital,  Mexico,  mills  at    1182 

Metal  riffles,  expanded 772 

Metallic  Extraction  Company,  capacity  of  rolls 103 

plant,  Argall  four-tube  drier  at 1600 

Metallurgical  tests 1167 

treatment,  problems  involved  in 1943 

Metallurgy,  defined v 

Metals,  specific  gravities  of 1188 

Meter,  equivalents  of  1187 

Methods  of  crushing 8 

dressing  and  cleaning  plates  757 

feeding  gravity  stamps 207 

jigs 548 

preliminary  crushing 9 

running  five-foot  pans  in  combination  mills  . . .  249 

jigs '. . . .  551 

studying  mills    1613 

testing 1137 

working  amalgamating  pan 248 

Metric  system  of  weights  and  measures  1187 

ton 883 

Mexican  crushing  and  milling  plant,  a  primitive.     F. 

H.  Probert 2038 

Mexico,  cheap  gold  milling  in.    H.  T.  Collins 2033 

cost  of  producing  gold  in 1980.  1981 

mill  in 1180 

milling  at  El  Oro.    E.  Burt 2046 

in  2046 

ore  dressing  at  Santa  Fe.    H.  T.  Collins 2040 

silver  mill  in 1184 

Meyer  &  Charlton,  gold  extraction  at 1647 

Gold  Mining  Company  Ltd.,  mill  of    1646 

mill  details  of  stamps 221 

M.  Hoagland  Sons  and  Company 77 

Miargyrite,  specific  gravity  of 1189 

Mica  dressing,  general  article  on.     G.  W.  Colles 2027 

grinding  of  scrap 2017 

milling  of.     F.  Cirkel 2025 

Micas  for  washing  kaolin    1077 

Michell  &  Tregoning  pulverizer   233 

bibliography  of    294 

Michigamme  iron  mine 1135 

magnetic  separation  at 802 

mill  at 1175 

Michigan,  cost  of  milling  in 1135 

mill,  a  recently  completed 2039 

milling  copper  ore  in.     C.  F.  Jackson  2047 

mills  in : 1181,  1182 

Micrometer  caliper,  Snyder    1362,  1366 

gauge 1159 

for  measuring  grains 1138 

microscope 1363,  1996 

Microscope 1 160 

micrometer  for  measuring  grains  470,  1146 

the  Ultra 1419 

for  the  study  of  slimes 1401 

Middlings,  crushing  of 1119 

defined    318 

disposition  of 1 108 

division  with  concentrates  and  tailings 1164 

on  machines 1112 

product  892 

size  of  recrushing   1116 

treatment  of 1121 

Midland  coal  breaker,  West  Virginia.     F.  W.  Parsons  2051 

Mid  vale  Co.,  steel  for  shoes  and  dies 185 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Midvale  steel  ring  dies  at  mills,  life  of    1728,  1775 

roll  shell  at  mills..  1701,   1727,   1750,   1751,    1752, 

1771,  1772,  1773,  1774,  1803,  1837,  1838,  1854 

1866,  1867,  1877 

trunnion  tires  at  Mill  144,  life  of 1775 

Milburn's  crushing  rolls Ill 

Mile,  equivalents  of   1187 

Miles,  William  A.,  wash  trommel   335 

Milk  of  lime,  use  of  at  Crown  Reef  Gold  Mining 

Company's  mill 1416 

Mill  1 339,  486,  498,  499,  892,  893,  1113,  1116,  1119 

2..  10,  319,  339,  486,  498,  499,  522,  892,  893,  1100, 
1101,  1112,  1116,  1119 

3.  .24,  64,  66,  87,  498,  499,  892,  902,  1091,  1100,  1101, 
1116,  1119,  1129 

4 321,  362,  486,  491,  502,  895,  1116 

5... 322,  339,  347,  350-352,  358,  405,  480,  486,  491, 
873,  879,  895,  896,  1098,  1114,  1116 

6..  341,  870,  895,  897 

7 327,  334,  341,  872,  895,  897,  1116 

8 895,  899,  1116 

9.  .524,  528,  533,  548,  550,  552,  571,  574,  575,  587,  590, 

592,  593,  606,  609,  900-902,  1116,  1126 

10.. 24,  26,  64  66,  72,  76,  90,  91,  101,  347,  350,  352, 

358  359  361  366,  524,  528,  537,  540,  545,  547, 

550,'  552|  571,  575,  587,  590,  592,  593,  596,  599, 

601  603-606,  609,  863,  900-902,  908,  917,  1091, 

1100,  1105,  1112,  1113,  1116,  1126,  1129 

11...       ...362,  366,  706,  707,  900,  902,  1116 

12.  .24,  64,  66,  76,  90,  319,  339,  347,  350,  352,  486,  488, 

491,  506,  524,  528,  540,  550-552,  577,  604,  865, 

900  903,  1091,  1100,  1103,  1105,  1111,  1116 

13..  10-12,  24,  26,  47,  339-341,  362,  366,  480,  485, 

488,  491,  498,  499,  515,  523,  524,  528,  529,  540, 

547    548,  551,  552,  572,  574,  576,  589,  592-594, 

605,875,900,904,1091,1099,1100,1114,1116,1119 

14. .  10,  339,  480,  485,  488,  491,  524,  530,  536,  540,  548, 

550-552,  572,  574,  592,  593,  596,  605,  900,  905, 

1091,  1116,  1119 

15.  .24,  26,  64,  66,  76,  87,  90,  91,  101,  347,  350,  352, 

358,  359,  366,  399,  442-444,  485,  522-524,  528, 

530,  533,  537,  538,  540,  550,  552,  572,  586,  590, 

592,  593,  604,  605,  684,  689,  696,  863,  874,  875, 

900,  906,  907,  1091,  1100,  1116,  1129,  1163 

16.  .24  26,  64,  66,  69,  73,  76,  87,  90,  91,  97,  101,  347, 

350,  352,  354,  358,  366,  524,  528,  534,  540,  545, 

546,  549,  550,  552,  570-572,  579,  592,  593,  604, 
605,  863,  893,  906,  908,  1091,  1105,  1111,  1116 

17. .  12,  24,  26,  64,  66,  69,  72,  76,  90,  91,  97,  101,  347, 
350,  352,  354,  358,  366,  400,  480,  486,  524,  528, 
534,  540,  547,  550,  552,  584,  590,  592,  593,  596, 
599,  605,  863,  893,  906,  908,  1091,  1105, 1111,  1116 

18.  .24,  26,  64,  66,  76,  90,  101,  347,  350,  352,  358,  366, 

369,  373,  410,  444,  522-525,  528,  530,  533,  537, 
538,  540,  550,  552,  590,  592,  593,  604,  648,  863, 
906,  909,  911,  1090,  1091,  1100,  1112,  1114,  1116, 

1121,  1129 

19.  .24,  64,  66,  76,  347,  350,  352,  358,  427,  444,  456, 

486,  489,  491,  524,  552,  590,  648,  906,  910,  1114, 

1116,  1121 

20.  .24,  26,  64,  66,  69,  70,  72,  76,  83,  90,  91,  95,  101, 

347,  350,  352,  354,  355,  357,  358,  361,  366,  421, 

524,  528,  537,  540,  541,  550,  551,  554,  572,  574- 

576,  592,  593,  604,  605,  638,  648,  663,  857,  863, 
872,  873,  875,  906,  913,  1091,  1100,  1103-1105, 

1112,  1116,  1129 

21.. 24,  26,  64,  66,  72,  76,  87,  90,  97,  101,  280,  281, 
347,  350,  352,  358,  359,  361,  366,  369,  413,  451, 

525,  528,  537,  538,  541,  546,  547,  550,  554,  573, 

577,  592,  593,  596,  601,  603,  605,  684,  691,  696, 
697,  863,  875,  906,  915,  1089,  1100,  1105,  1112, 

1116,  1122 

22.. 30,  31  34,  64,  66,  69,  72,  76,  87,  90,  91,  95,  97, 
101,  320,  338,  339,  347,  350-352,  356,  358,  359, 
361,  366,  381,  383,  399,  442,  456,  462,  523-525, 
528,  533,  534,  537,  538,  541,  550,  554,  572,  573, 
579,  584,  587,  592,  593,  599,  604,  605,  684,  688, 
693,  697,  856,  857,  870,  872,  874,  875,  916,  917, 
1100,  1102,  1103,  1105,  1112,  1116,  1122,  1129, 

1140,  1141 

23.  .24,  64,  66,  71,  76,  87,  90,  91,  347,  349,  350,  352, 

358,  359,  366,  442,  525,  528,  541,  554,  571,  592, 
605,  684,  882,  916,  917,  920,  1116,  1122 

24.  .24,  26,  50,  51,  64,  66,  69,  72,  76,  90,  91,  101,  347, 

350,  352,  355,  358,  359,  361,  366,  414,  444,  446, 
456,  517,  525,  528,  529,  535,  537,  538,  541,  546, 

547,  549,  550,  554,  577,  579,  584,  589,  592,  593, 
604,  605,  648,  663,  664,  684,  692,  863,  870,  916, 
917,  921,  1091,  1092,  1100,  1101,  1105,  1106,  1112, 

1114,  1116,  1122,  1129 


Mill 25..  11,  24,  26,  47,  64,  66,  69,  70,  72,  73,  76,  87,  90, 
91,  97,  98,  101,  321,  347,  350,  352,  358,  359,  366, 
442,  444,  451,  456,  460,  517,  525,  528,  529,  537- 
539,  541,  546,  547,  549,  550,  556,  571,  577,  587, 
592  593,  596,  599,  605,  607,  608,  682,  857,  863, 
869,  870,  872,  874,  875,  916,  924,  1086,  1088,  1091, 
1096,  1100,  1103,  1105,  1106,  1108,  1112,  1114, 
1116,  1119,  1130 

26.  .30,  31,  35,  42,  46-48,  50,  64,  66,  68,  69,  72,  76,  87, 
90  96  97,  101,  272,  273,  347,  350,  352,  357-359, 
361,  366,  392,  393,  456,  460,  525,  528,  537,  540, 
541,  546,  550,  556,  572,  574,  592,  593,  596,  604, 
605  648,  655,  663,  664,  843,  856,  861,  863, 
872,  925,  926,  1091,  1100,  1103-1106,  1112, 

27.. 24,  26,  64,  66,  69,  72,  76,  90,  94,  101,  156,  158, 
164,  166,  167,  170,  177,  178,  180,  182,  185-187, 
189-192,  195-199,  201,  205,  207-209,  212,  214, 
219,  280,  281,  347,  350,  352,  355,  356,  358,  366, 
368,  432,  444,  451,  456,  480,  486,  489,  491,  525, 
528,  533,  535-538,  541,  546,  550,  556,  585,  587, 
592,  593,  604-606,  638,  648,  684,  692,  768,  856, 
863,  864,  872,  874,  875,  879,  880,  883,  925,  928, 
1090,  1091,  1096,  1100,  1105,  1107,  1112,  1113, 
1116,  1119,  1171 

28..  10,  24,  26,  30,  31,  64,  67,  69,  72,  76,  90,  91,  97, 
101,  104,  280,  281,  339,  340,  345,  347,  350,  353, 
358,  359,  366,  381,  383,  388,  425,  432,  442,  444, 
456,  461,  462,  525,  528,  535-538,  541,  546,  549, 
550,  556,  574,  583,  585,  586,  592,  593,  596,  599, 
604-606,  638,  684,  692,  694,  856,  864,  871,  875, 
925,  933,  1004,  1091,  1100,  1103-1105,  1116, 

1141 

29.  .24,  26,  64,  76,  87,  90,  347,  350,  353,  359,  366,  525, 

541,  556,  592,  593,  598,  602,  605,  684,  863,  880, 

925,  926,  935,  1089,  1100,  1105,  1116,  1122 

30..  10,  24,  26,  46,  64,  66,  67,  69,  72,  76,  87,  90,  91, 
97,  98,  101,  339,  347,  350,  353,  358,  359,  366,  382, 
383,  419,  444,  446,  449,  456,  463,  481,  486,  489, 
491,  522,  523, 525,  527,  528, 530,  532,  533,  537-539, 

541,  546,  547,  549,  550,  556,  572,  573,  577,  579- 
581,  586,  587,  592,  593,  604,  605,  638,  648,  658, 
661,  684,  688,  692,  693,  695,  696,  855,  861,  863, 
872,  875,  936,  937,  1089,  1100,  1105,  1109,  1112, 

1113,  1116,  1141,  1164 

31.  .24,  26,  63,  64,  67,  69,  72,  76,  87,  90,  91,  97,  101, 

104,  347,  350,  353,  358,  362,  366,  442,  444,  456, 
481,  489,  491,  525,  528,  534,  535,  537,  542,  550, 
558,  572,  577,  582,  587,  592,  593,  596,  604,  605, 
648,  684,  692,  697,  857,  863,  872,  875,  936,  940, 
1091,  1100,  1105,  1116 

32.  .24,  26,  64,  67,  69,  76,  87,  90,  91,  97,  101,  102,  339, 

347,  351,  353,  354,  359,  366,  393,  444,  525,  528, 

542,  550,  558,  572,  587,  592,  593,  604,  605,  648, 
684,  697,  856,  857,  863,  875,  936,  942,  1100,  1101, 

1105,  1112,  1116,  1119 

33.  .24,  26,  67,  76,  91,  347,  351,  353,  359,  366,  396,  442, 

525,  542,  558,  572,  584,  592,  593,  605,  684,  697, 
857,  936,  945,  1116 

34.  .46,  64,  67,  76,  87,  339,  347,  353,  359,  366,  367,  449, 

456,  486,  525,  542,  545,  558,  587,  592,  593,  604, 

605,  648,  684,  856,  863,  875,  936,  946,  1089,  1100, 

1105,  1112,  1116 

35.  .46,  64,  66,  67,  69,  72,  76,  87,  90,  91,  97,  101,  337, 

339,  347,  350,  351,  353,  358,  359,  361,  366,  393, 
444,  458,  515,  525,  542,  546,  547,  550,  551,  558, 
572,  587,  592-594,  604,  605,  648,  661-663,  684, 
692,  694,  697,  856,  857,  863,  936,  947,  1089,  1100, 
1105,  1116,  1122 

36.  .24,  64,  76,  347,  351,  353,  366,  396,  442,  525,  526, 

542,  558,  572,  592,  605,  648,  684,  692,  936,  951, 

1110,  1116 

37.. 24,  64,  67,  76,  347,  351,  353,  358,  366,  398,  486, 

507,  522-524,  526,  528,  530,  531,  533,  534,  537, 

538,  550,  580,  592,  648,  684,  687,  692,  694,  697, 

842,  856,  863,  936,  954,  1089,  1091,  1116 

38.  .24,  26,  64,  67,  76,  91,  121,  126,  134,  280,  281,  339, 

347,  351,  353,  354,  358,  359,  366,  382,  383,  393, 
395,  444,  456,  458,  463,  517,  524,  526,  529,  542, 
546,  547,  550,  558,  572,  575,  579,  587,  592,  593, 
605,  638,  648,  661,  662,  684,  (593,  696,  697,  843, 
848,  857,  863,  872,  875,  879,  973,  974,  1085,  1087, 
1089,  1095,  1098,  1102,  1105-1108,  1112,  1116, 

1141 

39.  .24,  26,  64,  67,  69,  76,  91,  280,  281,  347,  351,  353, 

358,  359,  366,  396,  403,  404,  415,  416,  444,  526, 
527,  535,  537,  542,  545,  550,  562,  572,  575,  582, 
592,  593,  602,  605,  607,  638,  648,  661,  662,  857, 
863,  875,  973,  976,  1091,  1103-1105,  1112, 

1116 


64 


Pages  1199-1610,  Vol.  III. 


Mill  40 


41 


42 


43 


44 


45. 


47 


48. 


56. 


57. 


58. 


..  10,  24,  26,  48,  64,  67-69,  72,  76,  87,  90,  91,  101. 
313,  339,  347,  351,  353,  356,  361,  366,  373,  395, 
403,  404,  416,  444,  446,  456,  482,  483,  485,  526, 
528,  543,  546,  547,  550,  562,  579,  587,  592,  593, 
604,  605,  607,  638,  647,  648,  656,  663,  863,  872. 
875,  879,  973,  978,  1086,  1089,  1091,  1099,  1100, 
1103-1107,  1112-1114,  1116 

..  24,  26,  48,  64,  87,  347,  351,  353,  358,  366,  396, 
424,  444,  451,  456,  482,  526,  543,  546,  550,  562, 
572,  592,  593,  605,  647,  648,  650,  661,  663,  973, 
982,  1103,  1105,  1112,  1116,  1121 

.  .64,  67,  72,  76,  91,  97,  101,  118,  120-123,  126-128 

134,  258,  339,  340,  345,  347,  351,  353,  366,  396, 

403,  404,  444,  456,  458,  481,  486,  491,  515,  519, 
526,  528,  529,  543,  551,  564,  572,  587,  592,  605, 
638,  684,  696,  697,  863,  875,  984,  1085,  1098, 

1102,  1105,  1112,  1116,  1121,  1130 
.  .64,  67,  69,  72,  76,  91,  101,  118,  120-123,  126-128, 
133,  134,  339,  347,  351,  353,  358,  366,  396,  403, 

404,  444,  451,  456,  517,  526,  543,  546,  547,  551, 
564,  572,  587,  592,  593,  596,  604,  605,  648,  684, 
689,  692,  695-697,  843,  861,  863,  872,  875,  984, 
987,  1091,  1100,  1112,  1113,  1115,  1116,  1121 

..  18,  24,  27,  54,  118,  120-123,  126-129,  131,  133- 

135,  257,  259,  280,  337,  339,  392,  393,  404,  449, 
481,  485,  486,  489,  491,  515,  522,  526,  529,  537, 

543,  564,  571,  577,  580,  582,  583,  586-589,  592- 
594,  596,  601,  605,  638,  681,  684,  688,  694,  695, 
697,  843,  857,  861,  865,  866,  870-872,  874-876, 
990,  995,  1000,  1091,  1092,  1095,  1103,  1105. 

1108,  1109,  1112,  1113,  1116,  1120,  1149,  1191 
.121-123,  126,  128,  133-135,  320,  390,  391,  448, 
515,  526,  529,  537,  586,  587,  589,  592,  684  696 
805,870,990,993,  1091,  1103,  1105,  1110,1116,1130 
.  12,  24,  27,  118,  120-123,  126-128,  131,  133-135. 
320,  337-339,  390,  391,  396-398,  403,  449,  456, 
480-482,  485,  486,  489,  491,  515,  526,  537,  543, 

544,  547,  566,  571,  577,  583,  586,  587,  592-594 
605,  684,  689,  696,  697,  726,  727,  843,  870,  872,  875 
990,  994,  1088,  1091,  1103,  1105,  1110,  1116,  1131 

.  12,  24,  27,  118,  121-123,  126-128,  133-135  280 

332,  337-339,  397,  403,  449,  456,  480,  482,.  485, 

486,  489,  491,  515,  522,  526,  529,  537,  544,  566 

571,  572,  586,  587,  589,  592-594,  605,  684,  697, 

707,  726,  727,  843,  857,  870,  872,  875,  990,  998, 

1091,  1103,  1105,  1110,  1116,  1120,  1131 

.  10,  12,  24,  27,  118,  120-123,  126-131,  133-135, 

320,  337-339,  397,  398,  400,  404,  449,  456,  480- 

482,  485,  486,  489,  491,  515,  522,  526,  529,  537, 

538,  544,  547,  550,  568,  571,  572,  577,  586-588, 

592-594,  596,  599,  601,  605,  684,  689,  695-697 

843,  870,  872,  875,  990,  997,  1000,  1091,  1103 

1105,  1113.  1116,  1131 

270,  676,  1004,  1116,  1172 

1004,  1005,  1073,  1116,  1126 

1006,  1007,  1009,  1116 

1006,  1008,  1009,  1011,  1013,  1116 

.30,  31,  167,  170,  199,  202,  205,  207,  208,  212,  219. 

648,  655,  659,  663,  1014,  1089,  1091,  1100,  1103, 

1105,  1116 

.27,  46,  170,  199,  205,  207,  208,  212,  219,  339,  482. 

648,  663,  1014,  1015,  1110,  1116,  1131 

.24,  145,  148,  156,  158,  164-167,  170,  177,  178, 

180,  182,  186,  187,  189-192,  196-199,  201  202 

205,  207-209,  211,  212,  219,  222,  304,  482,  485 

491,  648,  665,  701,  768,  1014,  1016,  1030,  1091, 

1100,  1101,  1110,  1116 

.  145,  156,  158,  164,  165-167,  170,  174,  177,  178,  ' 
180,  182,  186,  187,  189-192,  196-199,  201,  202 
205-209,  212,  214,  219-222,  265,  724,  737,  740, 
744,  745,  748,  756,  768,  770,  783,  785,  1017,  1089, 
1093,  1103,  1105,  1116,  1119,  1131 
24,  27,  145,  153,  156,  158,  166,  167,  169,  174,  177, 
179-182,  186,  187,  189-192,  196-199,  201,  202. 
204,  205,  207-209,  212,  214,  219,  222,  252,  265, 
339,  340,  647,  648,  650,  655,  659,  661,  663,  664, 
735,  737,  740,  742,  744,  745,  748,  756,  759,  765 
768,  772,  774,  783,  1018,  1089,  1092,  1100,  1105, 
1116,  1131,  1191 

145,  156,  158,  166,  167,  170,  172,  178,  180,  182, 
186,  187,  189-W>  195-199,  201,  202,  205,  207- 
209,  212,  214,  2i  -,  222,  239,  252,  456,  648,  650. 
655,  661,  663,  73'.  744,  745,  748,  756,  772,  774, 
1018,  101.',  1089,  1100,  1103,  1105,  1116 
24,  27,  145,  156,  1  3,  166,  167,  169,  174,  177-180 
182,  186,  187,  189  192,  196-199,  201,  202,  205- 
209,  212,  214,  219,  222,  339,  340,  482,  647,  648, 
655,  659,  663,  664,  737,  744,  745,  748,  756,  759, 
765,  772,i785,  1018,  1020,  1088,  1089,  1100,  1103, 
1104,  1109,  1116,  1132 

65 


INDEX.  Pages  1611-2052,  Vol.  IV. 

Mill  60..  38,  46,  145,  156,  167,  169,  180,  182  189  199 

201,  205,  207,  208,  212,  214,  219,  222  648*.  650| 
661,  737,  740,  742,  744,  748,  1018,  1021,  1089) 

61.. 38,  46,  145,  156,  158,  164-167,  169,  174  175  l\lf 
179,  180,  182,  185-187,  189-192,  196-199,'  20l', 

202,  205,  207-209,  212-214,  219,  222,  266,  338- 
340,  648,  659,  661,  663,  664,  737,  740,  746  748 

756,  765,  768,  783,  785,  848,  858  860  861  875* 
1018,  1021,  1030,  1089,  1090,  1100,  1103,  'llOS', 

62.. 24,  27,  48,  145,  155,  156,  158,  165-167,  169  177- 
182,  185-187,  189-192,  197-199,  201,  202  205 
207-209,  212,  214,  219,  222,  265,  339  340  648* 
659,  661,  703,  733,  737  741  742  748',  750  756 

757,  765,  768,  772,  783,  1018,  1022,  1089,  lloS; 

63.  .24,  167,  170,  177,  178,  182,  190,  IQ^lQ^m  2056 
207,  208,  212,  214,  219,  648,  737,  756,  772,  1018 
1023,  1089  1116 
64.. 24,  27,  48,  145,  153,  155,  156,  158,  164-167,  169 

174,  176,  177-180,  182,  185-192,  196-199  20l' 
202,  205-209,  212-214,  219  222,  339,  340  648* 
659,  663,  733,  737,  740,  742,  745,  756,  768*.  772 
773,  864,  1018,  1023,  1089,  1100,  1103  1105* 

1116,  1132* 

65.  .24,  156,  158,  166,  169,  174,  177,  178,  180-182,  185, 

187,  189-191,  196-199,  201,  202,  207-209  212. 
214,  219,  222,  238,  265,  338,  339,  482,  491,  647 
648,  659,  661,  733,  735,  737,  738,  740  741  743 
744,  746-748,  750,  754,  756,  772,  773,  783,  1018, 
1024,  1039,  1089,  1092,  1103,  1104,  1116,  1132 

1168 

66.  .46,  47,  156,  166,  167,  169,  177,  180-182,  186,  187, 

189-192,  197-200,  202,  205,  207,  212,  214  219 
222,  252,  682,  735,  738,  741,  744,  745,  747,  753 
756,  760,  768,  773,  775,  781,  785,  1018,  1025 
1088,  1091,  1098,  1100,  1102,  1105,  1116,  1132 

67..  28,  145,  152,  153,  156,  158,  166,  167;  169/174 

175,  177-182,  184-187,  189-192,  194-199,  20l| 
202,  204,  205,  207-210,  212,  214,  219,  222,  482 
733,  735,  738,  740-742,  744,  746,  747,  752  756 
759,  765,  768,  771,  773-775,  783,  785,  872,  1018,' 
1026,  1030,  1091,  1100,  1103,  1105,  1106,  1116 

1133 

68.  .24,  27,  145,  156,  158,  164,  166,  167,  170,  174,  177. 
178,  180,  182,  185-187,  189-192,  196-199  201 
202,  205-209,  212,  214,  219,  222,  252,  303,  339, 
340,  482,  648,  659,  661,  664,  733,  735,  738,  741. 
744-746,  748,  755,  756,  783,  785,  1018,  1027,  1028 
1040,  1091,  1100,  1103,  1104,  1111,  1114,  1116, 

1133,  1134 

69..  158,  173,  175,  184,  212,  214,  648,  735,  745,  762, 
783,  785,  1018,  1028-1030,  1089,  1091,  1100, 
1105,  1116,  1133 

70..  167,  169,  178,  179,  182,  199,  202,  205,  207,  208, 
219,  586,  682,  738,  742,  744,  773,  1018,  1029,  1047, 

1089,  1116 

71. .  145, 156, 167,  170,  174, 177, 178, 182, 187,  189-191, 
196-199,  201,  205,  207-209,  212,  214,  219,  222, 
265,  418,  648,  660-662,  665-667,  738,  740,  743- 
745,  748,  772,  773,  780,  1029-1031,  1037,  1089, 

1092,  1116 

72..  24,  156,  158,  166,  167,  169,  174,  178,  179,  182, 
187,  189,  191,  192,  196-199,  201,  202,  205-209, 
212,  214,  219,  222,  265,  320,  339,  448,  456,  648, 
661,  676,  683,  738,  741,  743,  744,  747,  756,  772, 
773,  777,  783,  856,  1030,  1032,  1037,  1038,  1089, 
1100,  1116,  1133 

73.. 24,  145,  156,  158,  166,  167,  169,  173,  174,  176- 
182,  184-187,  189-192,  196-203,  205,  207-209, 
212,  214,  219,  222,  238,  265,  338,  339,  456,  482, 
485,  491,  647,  648,  659,  733,  735,  738,  740,  741, 
743,  744,  746-748,  750,  754,  756-758,  765,  772, 
773,  775,  781,  783,  1024,  1030,  1033,  1034,  1038, 
1089,  1092,  1100,  1101,  1103,  1116,  1132,  1168 
74..  24,  145,  156,  158,  166,  167,  169,  174,  177-182, 
185,  187,  189-191,  196-199,  201,  202,  205,  207- 
209,  212,  214,  219,  222,  238,  265,  338,  339,  482, 
485,  491,  647,  648,  650,  652,  659,  661,  733,  735, 
738-741,  743,  744,  746-748,  750,  754,  756,  783, 
1024,  1030,  1034,  1038,  1089,  1092,  1100,  1101, 
1103,  1117,  1132,  1168 

75..  145,  156,  158,  166,  167,  170,  178,  182,  186,  187, 
189-192,  196-199,  201,  202,  205,  208,  209,  211, 
212,  214,  219,  222,  339,  648,  659,  663,  664,  700, 
701,  703,  738,  744,  756,  772,  870,  1030,  1034,  1089, 
1090,  1103,  1105,  1117 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


MiU  76..  145,  156,  158,  166,  167,  169,  177,  179,  180,  182, 

186,  187,  189,  190-192,  196,  198,  199,  201,  202, 

205,  207-209,  212,  214,  219,  265,  648,  664,  703, 

738,  740,  743,  750,  765,  772,  879,  1030,  1035, 

1089,  1105,  1117 

77..  10,  145,  148,  156,  158,  164,  166,  167,  169,  174, 

177-182,  185-187,  189-192,  195-199,  201,  202, 

204-209,  211,  212,  214,  219,  220,  222,  342,  482, 

680-682,  703,  739,  741,  747,  753,  756,  757,  761- 

763,  765,  766,  768,  774,  842,  1030,  1035,  1046, 

1047,  1089,  1091,  1100,  1105,  1117,  1133 

78..  418,  444,  446,  648,  653,  655,  658,  660,  661,  665- 

667,  700,  702,  703,  857,  874,  1017,  1029-1031, 

1035,  1037,  1038,  1089,  1090,  1100,  1101,  1117, 

1126 

79..  456,  648,  655,  658,  700,  701,  703,  723,  875,  1030, 

1032,  1033,  1037,  1038,  1100,  1117 

80..  456,  700-703,  875,  1029,  1030,  1033,  1038,  1039, 

1100,  1101,  1117 
81  ........  238,  1030,  1038,  1039,  1089,  1100,  1117 

82.  .24,  27,  145,  156,  158,  164,  166,  167,  170,  174,  178, 

180,  182,  185-187,  189-192,  196-199,  201,  202, 
205-209,  212,  214,  219,  222,  244,  248-250,  252, 
339,  456,  458,  480,  486,  491,  648,  659,  661,  663, 
664,  723,  733,  735,  739,  748,  755,  756,  760,  761, 
763,  765,  766,  768,  777,  780,  785,  863,  1027,  1028, 
1039,  1040,  1091,  1100,  1101,  1103,  1104,  1111, 
1114,  1117,  1134 

83.  .46,  47,  145,  156,  167,  170,  174,  178,  183,  185-187, 

189-192,  196,  197,  199,  201,  202,  205-208,  212, 
214,  219,  244,  246,  248,  249,  252,  456,  458,  460, 
482,  648,  663,  777,  778,  780,  783,  1039-1041, 
1091,  1095,  1100,  1101,  1103-1106,  1110, 

1117 

84..  24,  27,  42,  46,  145,  156,  158,  166,  167,  170,  174, 
177,  178,  180,  181,  183,  185-187,  189-192,  196- 
199,  201,  202,  205-209,  212,  214,  219,  222,  244, 
246,  248,  249,  252,  339,  347,  351,  353,  354,  356, 
359,  366,  456,  458,  460,  648,  663,  739,  742,  743, 
748,  756,  768,  772,  777,  780,  783,  785,  860,  861, 
875,  1039,  1040,  1045,  1085,  1089,  1091,  1095, 
1100,  1101,  1103-1106,  1109,  1110,  1117,  1134 

85..  24,  65,  67,  76,  167,  169,  178,  179,  199,  202,  205, 

207,  208,  219,  220,  351,  353,  411,  442,  451,  526, 

528,  568,  586,  592,  682,  739,  742,  773,  1029,  1046, 

1047,  1089,  1117 

86..  24,  27,  65,  67,  72,  76,  87,  90,  101,  168,  169,  174, 
280,  281,  342,  347,  351,  353,  354,  366,  410,  419, 
526,  528,  544,  545,  550,  568,  572,  587,  588,  592, 
593,  604,  605,  648,  682,  684,  696-698,  703,  735, 
737,  739,  748,  756,  774,  785,  848,  857,  863,  872, 
879,  883,  1046-1048,  1091,  1100,  1105,  1117, 

1122 

.24,  27,  49,  65,  67,  72,  76,  87,  90,  101,  145,  156,  158, 
166,  167,  170,  178,  180,  183,  185-187,  189,  191, 
192,  196,  199,  202,  205,  207-209,  212,  219,  347, 
351,  353,  358,  359,  413,  427,  450,  451,  526,  528, 
537,  544,  568,  586,  592,  593,  648,  739,  742,  768, 


93. 

94. 

95 
96 
97 
98 
99 


848,  856,  863,  872,  1046,  1050,  1089,  1092,  1112, 

1117 

.24,  27,  65,  67,  76,  87,  90,  101,  145,  156,  158,  166, 
167,  169,  178,  180,  183,  189,  191,  192,  197-199, 
201,  205,  207,  208,  212,  214,  219,  347,  351,  353, 
358,  359,  414,  450,  451,  526-528,  537,  544,  550, 
568,  592,  593,  605.  648,  682,  739,  742,  773,  872, 
1030,  1046,  1052,  1089,  1105,  1112,  1117 
.21,  24,  27,  45,  46,  65,  67,  77,  87,  90,  91,  101,  347, 
351,  353,  362,  366,  790,  798,  863,  880,  883,  1053, 

1055,  1117 

.23,  24.  27,  30,  31,  65,  67,  77,  87,  90,  101,  302,  347, 
351,  353,  803,  861,  863,  1053,  1055,  1091,  1100, 

111? 

.  65,  101,  106,  107,  310,  340,  790,  810,  813,  816, 

843,  856,  858,  861,  863,  864,  881,  882,  883,  1053, 

1054,  1056,  1091-1094,  1096,  1098,  1100,  1108, 

1112,  1114,  1117,  1135 

.  24,  27,  65,  67,  77,  90,  101,  304,  338,  339,  341, 

347,  351,  353,  366,  451,  486,  489,  491,  522,  527, 

528,  544,  550,  570,  592,  593,  605,  790,  805,  807, 

814,  843,  860,  862-864,  880,  882,  883,  891,  1060, 

1063,  1088,  1091,  1094,  1112,  1113,  1117,  1135 

.24,  27,  65,  67,  69,  87,  90,  347,  351,  353,  354,  366, 

790,  800,  814,  895,  1060,  1065,  1117 

.  96,  103,  104,  309,  346,  848,  856,  861,  880,  882, 

883,  1070,  1091,  1094,  1096,  1190 

1616,  1934 

1481,  1617,  1934,  1940 
1620,  1934 

1620,  1621,  1932,  1934 
1620,  1622,  1934 


MiU  100 1275,  1570,  1614,  1623,  1934 

101 1489,  1623,  1626,  1934 

102 1623,  1629,  1934 

103 1291,  1292,  1517,  1631,  1934 

104 1634,  1934 

105 1634,  1635,  1934 

106 1371, 1406,  1416,  1516,  1634,  1639,  1934 

107 1634,  1645,  1934 

108 1634,  1646,  1931,  1934 

109 1634,  1648,  1934 

110 1634,  1651,  1934 

111 1652,  1654,  1934 

112 1652,  1657,  1934 

113 1581,  1652,  1659,  1934 

114 1541,  1652,  1660,  1934 

115 1652,  1665,  1934 

116 1665,  1934 

117 1665,  1666,  1934 

118 1286, 1291,  1294,  1676,  1934 

119 1679,  1934 

120 1361,  1452,  1614,  1620,  1934 

121 1361,  1680,  1685,  1934 

122  ..  1680,  1687,  1934 

123 1361,  1680,  1688,  1934 

124 1361,  1680,  1690,  1935 

125 1356,  1361,  1680,  1700,  1932,  1935 

126 1361,  1532,  1706,  1932,  1935 

127 1361,  1458,  1487,  1706,  1709,  1932,  1935 

128 1713,  1932,  1935 

129 1561,  1713,  1715,  1935 

130 1560,  1713,  1719,  1935 

131 1361,  1551,  1590,  1713,  1724,  1935 

132 1361,  1404,  1406,  1713,  1726,  1932,  1935 

133 1713,  1731,  1935,  1940 

134 1713,  1732,  1935 

135 1536,  1713,  1735,  1935 

136 1361,  1713,  1737,  1935 

137 1300,  1347,  1438,  1458,  1548,  1713,  1739,  1935 

138 1535,  1713,  1742,  1935 

139 1244,  1365,  1535,  1748,  1932,  1935 

140 1546,  1548,  1551,  1748,  1758,  1935 

141 1345,  1361,  1525,  1591,  1748,  1759,  1935 

142 1361,  1748,  1766,  1935 

143 1768,  1935 

144  ....  1361,  1365,  1590,  1592,  1768,  1771,  1932,  1935 

145 1780,  1935 

146 1783,  1936 

147 1783,  1786,  1936 

148 1361,  1783,  1792,  1936 

149 1564,  1794,  1936 

150 1794,  1795,  1936 

151 1794,  1802,  1936 

152 1345,  1361,  1585,  1804,  1931,  1936 

153 1814,  1936 

154 1341,  1815,  1932,  1936 

155 1368,  1369,  1815,  1816,  1932,  1936 

156 1361,  1530,  1531,  1815,  1817,  1936 

157 1815,  1818,  1936 

158 1361,  1527,  1585,  1815,  1820,  1936 

159 1361,  1828,  1936 

160 1831,  1936 

161 1361,  1836,  1932,  1936 

162  ..1328,  1329,  1361,  1391,  1449,  1493,  1615,  1836, 

1841,  1932,  1936 

163  ..        1836,  1848,  1936 

164  ....  1346,  1361,  1532,  1607,  1836,  1849,  1936 

165 1264,  1836,  1850,  1936 

166  ..  . .  1361,  1836,  1932,  1936 

167 1305,  1502,  1503,  1585,  1836,  1932,  1936 

168  ..       1836,  1860,  1937 

169 1361, 1836,  1864,  1932,  1937 

170 1361,  1836,  1865,  1937 

171 1361,  1836,  1868,  1931,  1937 

172 1317,  1361,  1836,  1871,  1931,  1932,  1937 

173  . .  .1408,  1413,  1585,  1595,  1836,  1875,  1927,  1928, 

1929,  1930,  1931,  1937,  1940 
174 1361,  1478,  1585,  1836,  1882,  1932,  1937 

175  ..        1888,  1937 

176  ..  ..1361,  1891,  1937 

177 1256,  1448,  1587,  1891,  1931,  1937 

178  ..  ....  1256,  1489,  1891,  1895,  1937 

179 1256,  1361,  1891,  1897,  1937 

180  ..       1256,  1891,  1901,  1937 

181 1250,  1254,  1256,  1361,  1891,  1906,  1937 

182 1254,  1256,  1891,  1908,  1931,  1937 

183  ..      1458,  1913,  1937 

184  ..  1913,  1914,  1937 

185 1915,  1937 

186 1916,  1937 

187 1919,  1937 


66 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Mill  188 1921, 

arrastra  . . 

at  Monteponi,  Sardinia  

buildings,  construction  of  

Clausthal  

constants  for  the  engineer,  importance  of.  F.  T. 

Snyder  

construction.  See  under  Construction. 

saving  of  mill  height  at  Mill  158 

data  on  spindle  breakers  

distributors 

for  asbestos  

clay  and  kaolin     

Elmore  oil  process    

graphite 

mercury  ores    

tin  ores 

heating  of 

Himmelfahrt  

Iron  Mountain 

Joseph  Wharton  

Laurenburg  

Mons  phosphate  

Monteponi 

numbers,  key  to  

plant  

practice  in  California,  gold.  E.  B.  Preston  .... 

processes  and  management 

sampling  at  Mill  182  


1996, 


sites 

Sulphur  Mines  &  Railroad  Co 

testing 

sieve  for 

tests 

treatment,  schemes  of 

Vieille  Montagne  Co 

with  stamps  and  canvas  tables 

Witherbee  Sherman    

work    

compared  with  small  tests 

Miller  pump 

Robert,  Hick  revolving  grizzly 

Millerite,  specific  gravity  of    

Milligram,  equivalents  of 

Millimeter,  equivalents  of 

Milling.     See  under  Ore  Dressing  and  Concentration 

accounts   

at  Gundling  No.  5.  Joplin  Missouri.     D.  Brit- 
tain 

costs  of  at  mills 1126,  1639, 1640,  1643, 

expenses   

experiences.     R.  D.  O.  Johnson    

improvements  in  1904  in 

in  Western  Chihuahua 

losses  

of  chromite 

plants  for  small  mines.     F.  L.  Bartlett    

practice  in  the  Witwatersrand,  South  Africa .... 
Mills,  arrangement  of 1086, 

bibliography  for 

California  versus  Colorado   

canvas  plants 

care  of 

choice  of 

complex  jigging,  at  Lake  Superior 

in  Colorado  and  Utah   

Idaho  and  Europe    

Montana     

southeastern  Missouri 

construction  of 

costs  of  erecting 

divisions  of  for  different  ores    

for  corundum  and  emery 

gold  combination 

key  to  numbers 

location,  capacity,  etc 

of 

magnetic  combination    

method  of  studying 

Mining  and  Reduction  Company 

name,  location,  minerals  and  capacity    

order  of  

outlines  of 

principles  in 

pulverizing 

saving  copper  and  sulphur  values 1616, 

gold  and  copper  values 1616, 

silver  and  copper  values 1616, 

lead  and  copper  values 1616, 

zinc  values 1616, 


1937 
1039 
1066 
1088 
965 

2048 

1826 
46 
857 
1079 
1075 
1072 
1074 
1074 
1081 
1098 
958 
897 
1058 
961 
899 
1066 

XXV 

1087 
1278 

888 
1912 
1365 
1085 

905 
1168 
1997 
1164 
1613 

911 
1038 
1059 

381 
1168 

927 

385 
1189 
1187 
1187 

'1122 

2046 
1793 
1123 
2048 
2047 
1664 
1945 
1073 
2036 
1643 
1107 
1173 
1030 
1029 
1114 
1161 
990 
925 
937 
973 
916 
1088 
1124 
1111 
1078 
1046 

XXV 
XXV 

1085 
1060 
1613 
1792 

XXV 

1616 
889 
889 
232 
1888 
1831 
1836 
1786 
1748 


Mills  saving  iron  and  copper  values   1616,  1828 

manganese  values 1616,  1814 

lead  and  zinc  values 1616,   1780 


zinc  and  copper 


.1616,  1794 


iron  values 1616,  1783 


only  asbestos 

copper  values  ..............  , 

diamonds 
iron  values 
lead  values 
mercury  values 
pyrite 

silver  values 
silver  and  lead.yalues 

lead,  and  zinc  values 
tin  and  tungsten  values 
zinc  and  manganese  values 
sectional   ...  ......  .  . 

sieve  scales  in  American,  table  of 
silver 

combination 


67 


1616,  1916 
.1616,  1891 
.1616,  1921 
1616,  1815 
1616,  1706 
,1616,  1919 
1616,  1913 
1616,  1679 
.1616,  1680 
1616,  1713 
.1616,  1915 
1616,  1804 

1108 

1361 

1039 

1039 

simple  jigging    900 

using  hand  jigs   892 

stamp   1013 

with  plates  and  vanners 1018 

no  vanners f 1017 

without  amalgamated  plates 1014 

steam  stamp  in  Montana 984 

using  fine  crushing  and  riffle  tables 1004 

hydraulicking  or  dredging 1006 

magnetism 1053 

with  jigs,  vanners  and  tables    1103 

log  washers 895 

Millstones,  discussion  of   2033 

Milwaukee  Mining  Co.,  mill 940 

Mimetite,  specific  gravity  of 1189 

Minas  Geraes,  Brazil,  strakes  at 725 

Tecolotes  y  Anexas  mill.     G.  A.  Burr   2037 

Mine  1    482 

12 481,  482 

24 '..  481,  482 

25 482 

26 481,  482 

30 481,  482 

31 481,  482 

35 481,  482 

38 481 

39 482 

42 481 

44 12 

46 12,  843 

47 12 

54 481 

57 482 

59 482 

67 482 

77 482 

83 481 

87 481,  482 

93 > 481 

and  Smelter  Supply  Company,  cone  classifiers  at 

Mill  141   1761 

blasting  in    9 

fines,  treatment  of 1111 

La  Motte  mill xxvi,  921 

picking  in 481 

water  used   1105 

Mineral  Resources  of  the  United  States,  pan  amalga- 
mation      1520 

aggregate 1 163 

examination „ 1162 

oils    1097 

Minerals,  adhesion  of 4 

aggregation  of   3 

changed  by  heat   4 

color  and  luster  of    

decrepitation  of 5 

effect  of  greasiness  of 4 

magnetism  of 4 

momentum  of    4 

settling  power    4 

specific  gravity  of   3 

floated  by  flotation  processes,  list  of 1555 

Flotation  Company,  flotation  processes 1560 

hardness  of 2 

list   of    good  and  poor  conductors  for  electro- 
static separation    1550 

magnetism  of 790 

separated    in  mills.     See   Individual    Mills    in 

Chapter  XX. 
Separation  Company,  flotation  process 1555 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Minerals  Separation  process  at  Mill  130  . .  1560,  1719,  1721, 

1723 

specific  gravities  of 1188 

structure  and  fracture  of 3 

tenacity  and  brittleness    2 

which  become  magnetic  on  roasting   1995 

Miners'  inch  measure  for  water 1197 

ton 883 

Mines  de  Pierrefitte    1780 

Mineville,  New  York,  mill  at 1059 

Minimum  difference  in  specific  gravity  for  jigging  . .      609 

Mining,  cost  of   1126 

costs,  statement  of    1947 

wire  cloth  screens,  sizes  of 1 196 

Minnesota  iron  mine,  Blake  breaker  at    23 

cost  of  crushing  at 60 

crushing  at 57 

Iron  Co.,  cost  of  breaking  ore    51 

Silver  Company,  Ltd 1731 

Minnie  &  A.  Y.  mill xxv,  909 

Minor  processes  of  separation 839 

Miscellaneous  apparatus   882 

machines  using  agitation 682 

plates 741 

processes  of  separation 790 

Missouri,  capacity  of  jigs  in 602 

concentration  in  southwest.     R.  B.  Brinsmade  .   2401 

cost  of  mill  in    1126 

milling  in    1129 

producing  lead  and  zinc  in 1968,  1969,  1970, 

1971,  1972,  1973,  1974 

drop  between  jig  sieves   550 

hand  jigging  in   893 

jigs  in   495 

jig  plunger  clearance  in 530 

jigs  in   507,  522,  642,  643 

-Kansas  district,  milling  in  the.     O.  Ruhl 2045 

concentration  in  the.     H.  A.  Titcombe    . . .   2036 

lead  and  zinc  mills,  methods  of  jigging  in 571 

mills  in  916 

zinc  ore,  sizing  test  on 303 

limestone,  jaw  plates  used  in  crushing 48 

mills  in.  .900,  1120,  1179,  1180,  1181,  1182,  1183,  1185 

milling  in    O.  M.  Bilharz '...   2034 

southwest.     O.  Ruhl 2043 

number  of  sieves  on  jigs  in 590 

Robinson  jig  in 504 

typical  milling  practice  in  Toplin.     C.  L.  Wat- 
son     2042 

R.  L.  Herrick 2042 

Zinc  and  Lead  Company  mill    2036 

jigs  in 609 

mills,  general  scheme  of.     R.H.Richards..   2040 
ores,  improvements  in  milling.     W.  E.  Ford . .   2039 

Mixed  sizes,  tests  on  jigging    630 

Mixer.     Blaisdell  mechanical  mixer    1603 

for  oil  separation 831 

Mixing  box  at  Mill  162 1843 

pans  at  Mill  188 1921 

vats  at  Mill  130 1722 

Moctezuma  Copper  Company    1831 

Modern  practice  in  California  gold  mills 1619 

Modifications  of  Collom  jig    515 

Evans  jig    517 

Frue  vanner 651 

Moisture  in  concentrates 880 

drained  ore 1106 

removed  in  driers   881 

samples 846,  1575 

Molasses  spigot  for  jigs  528 

Molybdenite,  concentration  of.     J.  Ohly 2029 

dressing 1567 

separated  by  oil 831 

specific  gravity  of   1 189 

Molybdenum 1569 

atomic  weight  of  1188 

Momentum  and  trajectory    1611 

of  minerals 4 

use  made  of,  in  mills 889 

used  in  dry  separation 819 

Monadnock  Chili  mills  at  mills 1775,  1850 

Monarch  breaker,  cost  of  crushing  by 51 

of  Blake  type     20 

table  of  sizes  of 21 

magnetic  separator 797 

Monazite  dressing  in  the  Carolinas 2030 

sands,  concentration  of.     F.  Katzer   2030 

sand  washing  in  the  Carolinas 2028 

C.  R.  Bohm 2027 

separated  by  magnets 790 


Monitor  and  Ajax  fraction  1732 

hydraulic  giant    333 

mill    1732 

Mons,  Belgium,  phosphate  dressing  at 1179 

plant  for  phosphate    895 

Montana  &  Denver  Reduction  Company  mill.     F.  D. 

Smith 2036 

Coal  and  Coke  Company,  coal  washing  at  the. 

J.  V.  Schaefer 2051 

copper  mills  in    973 

sulphide  mills 1103 

cost  of  mill  in    1 126 

milling  in    1 134 

district,  cost  of  producing  copper  in. .  1950,  1951,  1952 

1953 

dredging  in 1009 

Iron  Works,  rolls    76 

mills  in 1136,  1181,  1182 

Mining  Co.,  Limited,  mill xxviii,  1027,  1040,  1181 

sapphire  washing 1081 

Tonapah  mill.     F.  L.  Bosqui 2038 

Zinc  Company.  Blake-Morscher  separator  at  ...    1551 

Monte  Cristo  mill,  Huntington  mill  at  281 

Monteponi,  calamine  plant  at.     E.  Ferraris 2040 

cost  of  mill  at    1126 

Ferraris  belt  table  at    698 

classifier  at 400 

drum-type  magnetic  separator  at 1529 

jig  at  584 

magnetic  separator  at 1525 

screen  at 343 

jig  discharge  at 579 

jigs  at   523,  597,  642,  643 

removal  of  tailings 587 

magnetic  mill  at    1060,    1117 

separation  at 834,  836 

separator  at 799,  810 

roasting  for  magnetism  at  815 

Sardinia,  costs  at 1136 

mill  at 1066,  1179,  1181,  1185 

stay  boxes  used  at 588 

zinc  mill  at 1117 

Montezuma  Lead  Company  mill.     G.  A.  Burr    ....   2037 

Moonta,  Australia,  concentration  at   2033 

mines,  Hancock  jig  at   505 

Moore  filter-press  system  at  Mill  103 1633 

Moravia,  graphite  dressing  in 1183 

mill  in 1075 

Morel   &  Hall's  mill,  bibliography  for 295 

ball  mill    234 

Morenci,  Arizona,  type  of  settling  tank  used  at 1413 

Morey  &  Sperry  pulverizer 234 

bibliography  for 295 

Morgan,  P.  G.,  gold  dredging  in  New  Zealand    ....    1181 

Morison,  D.  B 215,  229 

efficiency  of  stamps 219 

limits  of  drop  in  stamps    216 

Morison's  pneumatic  stamp    143 

stamp  battery 229 

Morison's  curves  of  velocity  of  stamps 215 

experiments  on  stamp  efficiency 224 

high-speed  stamp    141,  2012 

Morning  mill,  Mullan,  Idaho,  .xxvi,  946,  1179,  1687,  2042 

stamp  mortar 228 

Star  cement  gravel  mine   211 

Morris  centrifugal  pump  at  Mill  139   1756 

at  Mill  175 1890 

Theodore  W.  &  Co.,  plate  glass  for  launder  lin- 

1595 
213 
2036 
1550 


Morro  Velho  mine,  height  of  discharge  of  stamps . . . 

stamp  mine,  Brazil  

Morscher,  Lawrence  N.,  electrostatic  separation    . . . 
Morse  Bros.  Machinery  &  Supply  Company,  the  Wild 

mill      1304 

F.  B.,  corrugated  vanner  belt 647 

Tustin  mill 294 

W.  S.,  an  Arizona  gold  stamp  mill 1175 

gravity  stamps 224,  225 

Mortar  beds  for  steam  stamps 114 

of  Nordberg  steam  stamps    1247 

blocks  for  gravity  stamps 145 

marshy  ground    148 

of  concrete 148 

cast  iron 148 

2012 

2011 

167 

.  1906 


box,  Bremner's    

Morison  open  front  . 

covers   

discharge  at  Mill  181.  . 
Mortar  discharge  for  Leavitt  stamp 

for  grinding  amalgam 780 


68 


Pages  1199-1610,  Vol.  I 


Mortar  hand,  for  testing 

housing  for  steam  stamps 

jig  discharge  for  steam  stamps 

jigs  at  Mill  177 


linings 

at  Mill  117 
Mortars  at  Mill  117 

Boss  individual  mortars 

standard  battery  mortar 
Dahlonega 
for  gravity  stamps 
gravity  stamp 


INDEX 


Pages  1611-2052,  Vol.  IV. 


1137 

119,  120 

1256 

.  1892 

166 

1668 

.  1668 
.  1265 

1267 

152 

160,  161 

1263 


Homestake  type  ............................  1267 

introducing  water  into  .......................  2011 

Men-all's  individual  mortar  ..................  1264 

Nordberg  steam  stamp  ......................  1003 

Rapid  Economy  individual  ...................  1266 

Schorr  stay-overflow,  the  .....................  1266 

single  and  double  discharge    .................  167 

standard  ten-stamp  battery  ..................  1267 

steam  stamps  ..............................  119 

table  of  dimensions  of   ......................  165 

weights  of  ...............................  164 

Traylor  double-discharge  ....................  1266 

sectional  mortars  .........................  1267 

Mosler,  C.,  Ball  stamp  ...........................  143 

Collom  jig    ..............................  643 

copper  dressing  at  Lake  Supperior   .........  1186 

Phoenix  pneumatic  stamp   .................  143 

stamps  in  Quincy  mill  ....................  230 

Mosser,  W.  F.  &  Co.,  rolls    .....................  76 

Motion  of  a  solid  through  a  liquid.    H.S.Allen...  1433 

Poynting  and  Thomson  .........  1433 

Motors,  increased  use  of  induction  motors  in  milling  1927 

Motte's  breaker  .......  :  ...............  .  ........  58 

Mouchet,  C.,  Harz  jigs  in  the  Vaucron  mill  ........  641 

pointed  boxes  at  the  Vaucron  mill  ..........  477 

rolls  at  Vaucron  mill    .....................  110 

stroke  of  jigs   ............................  594 

Vaucron,  Var,  France,  mill  for  galena  blende  1178 

Mould  for  melting    .............................  784 

Mount  Bischoff,  costs  and  results  at  ..............  2046 

mill.     D.  Clark  ..........................  2034 

stamps  at    ...............................  225 

Tasmania,  tin  mill  at  ................  ;  ----  1182 

tin  dressing  at.     S.  Fawns  .................  2042 

mill  ...................................  1083 

Hope  mine,  ore,  magnetic  separation  of  .........  810 

Lyell  Tasmania,  costs  of  producing  copper  in  .  1957,  1958 

Shasta,  California,  mill  at  .....................  1047 

Mounting  a  Blake  breaker   ......................  18 

of  jig  sieves    ...............................  540 

Moustier  centripetal  breaker  .....................  2010 

Mouth  of  spindle  and  jaw  breaker   ...............  54 

feed  openings  of  gravity  stamps     ...........  166 

Movable  sieve  power  jigs,  Bilharz  oblong  ..........  503 

Bradford  eccentric    .....................  500 

Conkling    .............................  503 

Hancock  vanning   ......................  504 

Hooper  vanning  ...............  .  ........  505 

intermittent    ...........................  506 

Robinson    .............................  504 

Schranz    ..............................  503 

sieve  continuous  power  jigs  ..................  499 

hand  jigs  ................................  495 

method  of  working  .....................  497 

table  of  practice  in  the  mills  .............  498 

jigs  ..................................  494,  1440 

Hancock  jig  ...........................  1440 

testing  jig  ...............................  627 

tables  for  amalgamated  plates    ...............  733 

Movements,  head  motion  for  Card  concentrator  ....  1483 

New  Standard  concentrator  ............  1478 

Overstrom  table    .....................  1485 

Wilfley  slimer  ........................  1504 

tables  .............................  1466 

of  breaker  jaws  .....................  ,  ......  23,  34 

Moving  power  of  water  .........................  878 

Moxham,  E.  C.,  concentration  plant  of  the  Bertha 

Zinc  Company,  Virginia  .......................  1180 

Mover  mill.'.  ................................  xxv,  910 

mine,  cost  of  hand  picking  at  ................  1439 

Mud  in  water    .................................  1105 

sills  for  gravity  stamps  ......................  152 

Mules,  cost  of   .................................  1126 

Mullan,  Idaho,  mil!  at  .......................  946,  1179 

Muller  ........................................  1137 

grinding  mills  ..............................  1310 

Hathaway  ..............................  1310 

Little    Giant    quartz    mill,    Oregon     Muller 

quartz  mill  or  Merrill's  mill  ............  1310 


Muller,  in  amalgamating  pans 245 

mortar  for  cleaning  amalgam 204 

grinding  amalgam 780 

process  for  corundum 1078 

Stanwood  gravity    1285 

Multiple  jaw  breaker  28 

Mumford  &  Moodie  dry  separator 818 

Mundic 900 

Mundt ifig 

Mundt's  screens 168 

Munich,  tests  on  strength  of  stone  at  301 

Munroe,  H.  S.  . . viii 

Blake  breakers  at  Bonne  Terre 57 

breakers    57 

comparison  of  the   English  and   Continental 

system  of 'jigging 1463 

density  of  pulp  on  slime  tables 695 

Evans  classifier   496 

table  at  Lake  Superior 728 

figures  on  practice  with  Lake  Superior  hydrau- 
lic classifiers 390 

formula  for  pulsion  velocity  in  jigging   1460 

E'ty  stamps 226 

ig  copper  at  Lake  Superior    640 

atory  slime  table 1 155,  2023 

Lake  Superior  hog-trough  classifier 40 1,  476 

milling  at  Lake  Superior 1174 

new  laboratory  classifier    2020 

Parson's  jigs  at  Bonne  Terre,  Collom  jigs  at 

Lake  Superior 640 

Rittinger  table 728 

separation  by  jigs 640 

sizing  tests  of  jig  products 607 

of  tailings  in  Mill  25    .  608 

slime  tables    697 

steam,  pneumatic,  and  gravity  stamps   224 

St.  Joseph  Lead  Company's  mill 1175 

tests  on  hindered  settling 626 

Munroe's  laboratory  slime  table 1 1 55 

Muntz  metal  amalgamating  plates 747,  750,  1515 

for  amalgamation  plates 1512,  2024 

plates,  preparation  of 754 

Murphys,  California,  Tustin  mill  at 1014 

Muscovite,  specific  gravity  of 1189 

Musterschutz  feeder 884 

Mysore,  India,  cost  of  producing  gold  in 1981 

N 

Nacosari,  Mexico,  the  new  concentrator  at.      H.  B. 

Layton    2036 

Nagel,  M.  L.,  free-settling  velocities 1421 

Nagle's  formula  for  belt  transmission 97 

Naphtha,  specific  gravity  of   1189 

Narod  pulverizer 235,  282 

bibliography  for 297 

National  Concentration  Company,  description  of  the 

Woodbury  system  1459 

Drill     and     Manufacturing     Company,     Blake 

breaker 1203 

Native  amalgam   731 

copper  ores,  mills  for 990 

Natural  feed  on  Wilfley  table 1471 

Navaho  mill 1092 

Nederland  mill,  wear  of  amalgamating  pans 249 

Needle  wire  gauge 1 195 

Needles  for  screens,  sizes  of 172 

Negaunee,  Michigan,  mill  at    1185 

Neill,  J.  W.,  on  roasting  and  magnetism 814 

Neodymium,  atomic  weight  of 1 188 

Neon,  atomic  weight  of 1 188 

Nernst  lamp  in  Mill  171  1871,  1931 

Net  yield 1123 

Neubert,  E.  W.,  analysis  of  products  of  hand  picking 

at  Freiberg,  Saxony 492 

and  O.  Bilharz    xx 

dressing  at  Freiberg,  Saxony 1174 

Neue  Helene  mill 1087 

mine  Hohenlohe  Werke 1783 

Neuerberg's  mill,  bibliography  for 293 

rolls  110 

Neuerberg  system  of  trommels 364 

trommel    385 

wet  mill 233 

Neuhof  mill 1186 

Nevada  City,  stamps  at 230 

Consolidated  Copper  Company   1866 

Engineering  Works,  sample  grinder 1284 

Goldfield  Reduction  Company 1629 

mills  in 1174 

sample  grinder 1284 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Newaygo  Portland  Cement  Company,  Newaygo  sep- 
arator        1360 

screen,  data  on  the 2018 

separator 1350,  1360 

table  of  capacities  with  various  sizes  of  screens    1351 

New  Blanton  cam 194 

Bulfontein  Diamond  Co 839,  1081 

Caledonia,  chromite  mill  in 1074 

central  mill  of  the  Aktien  Company 1786 

ore  dressing  plant,  Clausthal 1795 

Century  Blake  breaker 1203,    1222 

differential  motion  jig  at  mills   . . .  1760,  1765,  1812 

disintegrating  screen 2018 

drop  motion  jig    537,  2022 

jig     1444,  1459 

magnetic  separator,  Knowles    1541 

Chum  Consolidated  mill,  amalgamated  plates  in      745 

Comet  mill,  details  of  stamps 221 

Newcum,  W.  A., 228 

Elkhorn  mill 1134 

Newell  &  Newell,  plates  in  Penn  and  Iron  City  mills, 

Colorado 789 

stamps  at  the  Penn  mill,  Gilpin  County,  Col- 
orado       229 

S.  V.,  on  drop  of  stamps 220 

Newfoundland  chromite  concentrated  by  free  settling     475 

crushed  by  rolls,  sizing  test 99 

sized  in  Richards'  classifier 407 

New  Himmelfahrt  mill 958 

Newhouse  mine  and  mill 2037 

Mines  and  Smelter  Company 1923 

New  Humboldt  concentrator    1493 

improved  Huntington  mill 1313 

Jersey   &  Pennsylvania  Concentrating  Co.,  mill   1056 
bluestone  rock,  treated  in  Frisbee  Lucop  mill      267 

costs  of  milling  in 1135 

Iron  Mining  Company,  mill xxix,  1055 

mill  in    1179,  1183 

,        Zinc  Company 1804 

Kleinfontein  Company,  conveying  belt  at  plant  of  1585 

mill,  S.  Africa,     E.  G.'  Wary 2039 

Mexico,  mill  in  1180 

stamps  in 226 

plate  error 747 

Primrose  mill,  detail  of  stamps    221 

Smuggler  concentrator xxvii 

mill    1004 

South  Wales,  stamps  in 227 

hydraulicking  in    1006,  1179 

Standard  classifies    1369,  1373 

concentrator 1478 

W.  G.  Weatherby 2023 

Newton  gold  mill xxviii,  1029 

jigging  mill xxviii 

mill    227,  1047 

mortar 165 

rate  of  crushing  in    165 

shoes  and  dies  181 

mortar    163,  227 

slope  of  screens  176 

Sir  Isaac,  law  of  eddying  resistance    1425 

New  Woodbury  concentrator 1494 

York  mill,  acid  water 173 

Zealand,  dredging  in    1009,  1179,  1181 

dredges  in 1184 

gold  yield  for  April,  1899    2049 

plates  in  788 

stamps  in 226,  227 

water  used  in  stamp  mills 222 

N.  Henninger's  limonite  washer 895 

Niagara  crusher  and  pulverizer  233 

bibliography  for 294 

Falls,  power  at    1090 

pulverizer,  sizing  test  on  315 

Niccolite,  specific  gravity  of   1189 

Nicholas  pulverizer 233 

bibliography  for    292 

F.  C.,  the  Elmore  flotation  process  2030 

H.  S.,  slime  settling   1414 

Nichols  Chemical  Co.,  mill xxv,  905 

slime  table  at  Mill  174 1478 

Nicholson,  Frank,  blende  in  the  Joplin  district    1183 

concentrating  blende  in  Missouri 1183 

Nichter  spiral  slate  picker 2021 

Nickel  amalgam    730 

atomic  weight  of 1188 

in  steel  roll-shells  at  Mill  128 1714 

magnetic  separation  of 833 

ore,  dressing  of   1 185 

specific  gravity  of   1 189 


Nip,  angle  of 89 

for  gyratory  breakers 1218 

rolls  1226 

Nissen,  Peter,  tests  at  Boston  Consolidated  mill 2013 

individual  stamp  mortar    1263 

stamps  at  Boston  Consolidated    1278 

Home  Run  Mill,  Prescott,  Arizona  1264 

Mill  165   1850,  1851,  1852 

capacity  of 201 1 

at  Mill  165 1264 

description  of 2012 

Niter  for  melting ; 784 

Nitric  acid  used  on  amalgamated  plates 752 

Nitrogen,  atomic  weight  of 1188 

Nitzo,  H.  B.  C.,  and  H.  A.  J  Wilkens,  gravity  stamps     224 

magnetic  separation 835 

plates  at  the  Haile  gold  mine 787 

Wetherill  magnetic  separators 833 

Norbom  vanner 652 

North  Brookfield,  Nova  Scotia,  ore  from 1147 

Nordberg  Corliss  engines 987 

Manufacturing    Company,    tests    on    Nordberg 
steam  stamps 1261 


1911 


pump 

rolls  at  Mill  182 


single-cylinder  steam  stamp  at  Mill  179 1897 

indicator  diagrams  of    1250,  1251 

test  at  Mill  181  1250 

steam  stamp 997,  1004,  1247,  2011 

comparison  between  single  cylinder  and  com- 
pound     1254 

foundations,  anvil  blocks,  mortar  beds,  sills, 

and  girders 1247 

piston,  piston  rod,  dash  pot,  flange,  revolv- 
ing pulley,  stamp  stem,  stamp  shoe  of  ...  1247 

single  cylinder  1249 

steam  cylinders,  valves,  and  valve  gears  of  1249 
tandem  compound  at  Osceola  and   Tama- 
rack    1254 

steeple-compound  steam  stamp  at  mills  . . .  1894,  1895, 

1901 
North  American  Lead  Company,  Missouri,  mill  of  the. 

R.  B.  Brinsmade 2042 

Brookfield,  Nova  Scotia,  plates  at 765 

Butte  Mining  Company 1836 

Carolina,  amalgamator 788 

mills  in 1180 

separation  of  corundum  in   9 

Northey  pump 1027 

North  Star  mill 1175,  1182 

California,     A.  D.  Foote 2045 

dies  used  in   180 

Grass  Valley,  California,  milling  practice  at 

the.     G.  E.  Alexander 2043 

mortar 165 

plates  in  787 

stamps 224 

foundation 145 

wear  of  shoes  and  dies 183 

Mines  Company.     A.  D.  Foote 1925 

central  mil)  of   1617 

mill xxvii,  1018 

mortar 161,  162 

mouth     167 

on  Sultan  mill 1050 

Siiverton  Mining  Company xxix 

stamp  mill    149 

Nova  Scotia,  cost  of  nulling  in 1133 

gold  milling  in 1174 

ore,  tests  on 1117 

mill  in 1184 

new  mining  plant  at  Salmon  River.     B.  Mc- 
Donald     2034 

stamp  milling.     E.  P.  Brown 2034 

mill  practice *. 2043 

Nozzles  for  water  wheels 1090 

Number  of  compartments  on  jigs    507 

drops  of  stamps 215 

Tremain  stamp 138 

jaw  compared  with  spindle  brenkers 51 

mills,  key  to xxv 

sieves  in  jigs 524,  588 

strokes  on  jigs 553,  592 

See  also  "       ' 


Oakum  for  caulking 735 

Oberegger  coal  jig.    V.  Waltl 2022 

gyratiag  screen    386 


70 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Oberegger  jig  for  coal  washing    2021 

Occasional  expenses 1 123 

Ocean  water,  specific  gravity  of     3 

Ochre  washing 1 173 

Octagonal  revolving  screens   1353 

trommels 362 

Octave  mill.     W.  A.  Root 2046 

stamp  mill,  Weaver,  Arizona.     D.  E.  Bigelow   .    2043 

Odell  rolls    Ill 

Odling  magnetic  separator 2028 

Office  for  mill    1088 

Ogle,  J.  P.,  breaking  59 

fine  jaw  breaker    59 

Oil,  attraction    of    minerals   for    residuum.       J.  F. 

Hamilton    2025 

concentration  at  Santa  Barbara,  Van  Meter  pro- 
cess        1993 

in  America,  history  of    2029 

increasing  efficiency  of.     A.  Schwartz 2027 

mill 1072 

of  a  siliceous  ore.     C.  M.  Fassett 2029 

ores.     W.  McDermott 2027 

tests  at  Mill  172   1874 

consumed  in  driers  880 

cost  of  for  breakers 49 

engines    1091 

for  belts    1094 

lubrication    1097 

smoking  moulds    784 

process  of  separation    831 

required  for  breakers 50 

suited  for  use  in  Elm  ore  process    1558 

testing  by 1 155 

Olcott,  E.  E.,  on  cost  of  gold  milling 1134 

Old  Bed  magnetic  concentrating  mill . 1059 

Buchanan  breaker,  table  of  movements  of 23 

Clitters  mine    1915 

Dominion  Copper  Mining  and  Smelting  Com- 
pany     1882 

copper  handbook 1925 

Globe,  Arizona,     concentration     at.      H.     J. 

Baron   2043 

English  gauge   1195,    1999 

screen  gauge 173 

wire  gauge   1364 

Oldham  mill 732,  1133 

amalgam  from 765 

blow  of  stamps    220 

breaker  in 60 

chuck  blocks  in    177,  178 

dies  used  in   180 

Golden  Gate  table  in 681 

mortar 165 

plates  in   789 

rate  of  crushing  in    165 

shoes  in 181 

stamp  bosses    1 87 

screens 169 

stems 187 

stamps  in   228 

wear  of  stamp  shoes  and  dies 183 

mortar 162 

stamp  mill    1184 

Old  Hundred  mill,  Howardsville,  Colorado 2042 

Jordan  &  Galena  Mining  Co.,  mill xxv,  913 

Star  of  the  East  mill,  Australia,    mercury    wells 

in ". 769 

gold  caught  in  wells  in 771 

Union   mill,    Breckenridge,    Colo.,    practice     at 

the.     D.  H.  Laurence    2045 

Summit  County,  Colorado,  flow  sheet  of  the. 

D.  H.  Laurence 2046 

Oligoclase,  specific  gravity  of 1189 

Oliver  Iron  Mining  Company,  washing  plant  for  iron 

ores 1815 

Olsen  testing  machine  for  strength  of  rock   311 

One-current  classifier 1144 

Ontario,  copper  sulphide  mill  in.    H.  J.  C.  Williams.   2034 

corundum  dressing  in 1181 

custom  mill  at  Keewatin.     F.  H.  Probert 2040 

dry  stamping  mill,  sizing  tests 210 

mill    1134 

amalgamating  pans  at   290 

breaker  in 57 

silver  mill    1174,  1179 

Opal,  specific  gravity  of 1189 

Open-hearth  high-carbon  punched  plate  at  Mill  180, 

life  of    1902 

Opening,  discussion  of  the  designations  of  size  of. 

E.  A.  Hersam    2019 


Opening  for  ventilation    1099 

in  wire  screens,  sizes  of  1196 

measurement  of  screen 1362 

percentage  of,  in  jig  screens 546 

Operating  costs  1940 

with  all  slime  filter-pressing  system 1648 

American  Process  Company's  driers 1599 

Argall  4-tube  drier   1600 

Blaisdell  system 1603 

flotation  processes 1562 

minerals  separation  process 1561 

Oxland  roasting  furnace   1549 

Trego  roasting  furnace 1548 

Operation  of  Blake  breaker    16 

canvas  tables. 700,  701,  702 

circular  slime  tables 692 

Gates  breaker    1222 

hand  jigs 497 

settlers 778 

slime  tables    684 

vanners  657 

Wilfley  roasting  furnace,  attendance  required 

for   1548 

Ophir  Con.  Mines  Co.,  Colorado,  the  mill  of  the    . .  2044 
Oppermann,|  M.,  Harz  jig  at  Ammeberg,   Sweden, 

Utsch  jig 641 

zinc  dressing  at  Ammeberg,  Sweden 1176 

Orange  peel  dredge    1009 

Order  of  drop  of  gravity  stamps   1274 

at  Mill  100 1275,  1624 

stamps 194,   214 

at  Mill  114 1661 

Mill  117 1668 

mills 1616 

Ordinary  direct  plot 1142 

Ore  bins  842 

breakers,  Gates  type    1222 

concentrator,  the  Charleton 427 

deposits  of  U.  S.  and  Canada.     J.  F.  Kemp  . . .    1924 

dressing  compared  with  smelting 1 

divisions   ; 5 

principles,  summary  of 1611 

granulating  mill,  Cummings 255 

handling,  Blaisdell  system 1600 

kind  of,  in  gravity  stamps     207 

sorting  in  S.  African  gold   mine.     Webb   and 

Yeatman 2021 

testing 1136 

washing  at  Elkton  mine 1616 

weighing  of 883 

weight  of,  before  and  after  breaking 1190 

Oregon,  dredging  in 1009 

muller  quartz  mill 1310 

Organization  of  labor  in  mill 1101 

Oriental  mill,  amalgamated  plates  in   745 

life  of  guides 155 

mercury  wells  in 769,  771 

Orion,  Co.,  stamp  mill 225,  1179 

Oro  Fina  mill,  heavy  stamps   220 

Plata  mine,  sizing  tests  of  ore  from 309 

Oroville,  California,  dredging  at 1008,  1012 

concrete  mortar  block  at 148,  229 

Oroya-Brownhill     mines,    Australia,     the    reduction 

works  of  the.     R.  Allen 2045 

Orpiment,  specific  gravity  of    1189 

Orthoclase,  specific  gravity  of 1189 

Osceola  Consolidated  Mining  Co 1181,  1906 

copper  handbook 1925 

mill xxvii,  131,  995,  1182,  1906 

Burgan  classifier  at 1371 

Lake  Superior,  Michigan.     L.  Fraser 2039 

Nordberg  tandem,  compound  stamps  at 1254 

slime  tables  in    697 

Osmium,  atomic  weight  of   1 188 

Osterspey,  classifier  invented  by 421 

discharge  for  jigs 582 

jig 538,642 

siphon  separator   478 

Otago,  dredge  at 703 

New  Zealand,  mills  at 1180 

plates  at   788 

stamps  at   226 

Ottawa  Gold  Mining  Co 1157 

plates  used  by 741 

vanners  used  by    657 

Otto  Abeling  jig  mechanism 641,    643 

Ounce,  equivalents  of 1 187 

Ouray,  Colorado,  mill  at 928 

Ouro  Preto,  Brazil,  amalgamating  pan  at 291 

mill  at  ..  ..    1182 


71 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Ouro  Preto,  Brazil,  milling  at 1173 

stamps  at   227 

Outlines  of  mills  889 

Outside  amalgamated  plates 731 

fastening  the  plates  to  the  tables 775 

position  of  in  the  mills 733 

principle  of  action 731 

tables  for  supporting 733 

total  areas  in  mills      744 

Ovens  district,  amalgamated  plates  in    745,  748 

mercury  wells  in 769 

plates  in    788 

stamps  at    226 

Victoria,  mills  in 1180 

Overflow  battery  for  gravity  stamps 214 

Overhead  crab 199 

Overlapping  error  on  amalgamated  plates 748,  757 

Overshot  water  wheel  1036,  1089 

Overstrom,  G.  A.,  experiments  with  launders 1592 

concentrator 2023 

sampler 2032 

table    679,  1479,  1485 

at  mills  ..1487,  1711,  1712,  1730,  1886,  1897,  1898, 

1899,  1901 

test  at  Mill  162  1493 

Owen,  F.,  gold  stamp  mills  in  the   Remedies  district  1182 

tin  placers  in  Perak,  Malay  Peninsula 1182 

Owyhee  mill,  banking  in  stamp  mortar 218 

breakage  of  stamp  stems 188 

details  of  stamps 223 

silver  mill,  amalgamation  at 787 

Oxidizing  roast  for  magnetism 1995 

Oxland  furnace  at  Mill  137    1548,  1741 

Oxygen,  atomic  weight  of   1 188 

effect  of  in  copper  plates 750 

Ozocerite,  specific  gravity  of 1189 


Pachuca  cams  at  Mill  101 1626 

stamp  battery 1272 

at  Tonopah  Mining,  Milling,  and  Develop- 
ment Company   1272 

Packard,  G.  A.,  dry  concentration  at  Round  Mt., 

Nevada  2038 

Packing  for  jig  screens 539 

Paddock  air  jig 820 

assay  of  products  of 823 

Pahang  corporation,  tin  mill 1084 

Pails  for  concentrates 1113 

for  moisture  samples    846 

Paint  for  mills 1089 

table  tops 1483 

Palladium,  atomic  weight  of 1188 

specific  gravity  of   1189 

Pallausch,  A.,  graphite  dressing  in  Bohemia 1177 

Pan  amalgamation   1167,  1517 

cost  of  milling 1134 

for  silver,  cost  of 250 

mills 1039 

notes  on   1520 

settling  tanks  for 459 

test 1157 

bottom  of  amalgamating  pans    241 

conveyors   860 

sampler 846 

Pandora  mill    1016 

mill  of  Smuggler-Union  Mining  Company  ....  xxvii 

Panning  at  clean-up 203,  266 


gold  ore,  dry 

Pans,  amalgamating  and  clean-up 

Colorado  Iron  Works  grinding  pan 

continuous  grinding    

for  amalgamating 

clean-up    

/  diamond  washing    

hand  panning 

mixing  at  Mill  188 

washing 

corundum  and  emery 

grinding,  Colorado  Iron  Works  Company 

Australian  practice   

sizing  tests  of  pulp  from   

wear  of  shoes  and  dies 

Hendy 

versus  tube  mills  

in  Australia,  efficiency  of  grinding 

water  for 


825 
232 
1282 
1282 
>,  777 
250 
1081 
1152 
1921 
333 
333 
1323 
1283 
1284 
1284 
683 
1282 
2014 
1105 


Paper  for  lining  cars    

used  in  retorts  

Parabolic  formula,  Rittinger's  . . . 

for  free  settling  

Parallel  arrangement  of  machines . 

rolls 


1113 

781 

471 

...472,   473 

1110 

1244 


McFarlane 1232 

Parallelism  of  rolls 71 

Paramagnetic  substances 796 

Parent,  pneumatic  concentration  at  the  Rheinpreus- 
sen,  the   Zollverein  collieries,   at  St.     Louis    and 

Lagrange    837 

Lucien,  Karlik  grizzly  bars,  trommels    385 

Park  City,  speed  of  jigs  at   593 

Utah,  mill  at    1 179 

Parke  and  Lacy  Company    30-34 

Blake  breaker  jaw  movements   34 

Dodge  breaker < . . .  28 

sizing  box 416 

Giant  rock  breaker 22 

Parker,  R.  A.,  false  shoe 229 

Parkhurst  &  Whipple  on  Griffin  mill 284 

Parkin,  C.,  pneumatic  stamps  in  Cornwall    143 

Parkyn,  T.,  tin  dressing  at  St.  Dennis,  Cornwall     .  1184 

Parlow,  P.  G.,  on  weight  of  stamps   220 

Parnall-Krause  stamp  mill  mortar 2011 

Parrot  mill,  Wilfley  table  at 675 

Silver  and  Copper  Mining  Company    1836 

mill xxvi,  982 

Parsons  &  Fisher  jig 517 

advantages  of 518 


construction  of 

disadvantages  of   

Cyril,  Huntington  mills  in  southern  Rhodesia 

Huntington  mills 

life  of  screens  in  Huntington  mill    

wearing  parts  of  Huntington  mills 
Parsons'  distributor 


525 
518 
1323 
2016 
1317 
1317 
857 
640 
529 
537 
,682 
973 
574 


Pape-Henneberg  dry  separator 818,  828,  890,  891 


72 


size  of  sieve  and  plunger 

water  for 

table    

Partial  turbine 

Partitions  across  jig  sieves 

Pasley,  C.  S.,  tin  dressing  in  Bolivia 1183 

Passau,  Bavaria,  Germany,  mill  at 1074 

Path  of  grains  in  trommel 376,  377 

settling  particle   453 

Patterson  Elephant  stamp 141,  143 

Patton  amalgamating  pan   291 

Paul,  A.  B.,  California  and  Colorado  systems 228 

milling    1184 

Paul's  arrastra 290 

ball  mill    293 

Paving  blocks,  strength  of 303 

Paxman  mill    282,  297 

Payne,  C.  Q viii 

magnetic  separator 799 

mine,  British  Columbia,  New  Century  magnetic 

separator  at    1542 

Peace  River  Phosphate  Company   897 

mill xxv,  897 

Peak  Hill  mine,  amalgamated  plates  in     751 

retort  residue  at    783 

Pearce,  Arizona,  ball  mill  at 261 

S.  H 884 

and  Caldecott,  W.  A 1292 

crushing  efficiency  of  tube  mills 1323 

data  on  sampling 851 

design  of  mining  machinery    2048 

discussion  of  H.  A.  White's  results 1340 

rules  for  sampling 849 

sampler  for  tailings    884 

tube  mill  grinding  in  S.  Africa 2014 

Pearl  (Australia)  mill,  wear  of  shoes  and  dies  in  ...  183 

amalgamated  plates  in 745 

(Idaho)  camp,  milling  in  the    2043 

Pearline  for  boiler  scale 1027 

Pebble,  Florida,  mill  at  897 

Pebbles,  for  tube  mills,  American.     A.  Lakes    2015 

amount  charged,  formula  for    1288 

at  mill  143 1770 

C.  C.  Schnatterbeck 2016 

consumption  of   1291 

for  tube  mills    1288 

Peck's  centrifugal  elevator 2031 

separator 828,    839 

Montana,  concentrating  mill.     G.  W.  Winter  . .  2036 

Pein,  A.  von,  rolls  with  tension  rods 112 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Pelton  water  wheels 931,  935,  939,  945,  947,  951, 

1015,  1019,  1020,  1021,  1022, 1023,  1029,  1032,  1034,  1089, 

1090 

at  Mill  96 1619 

for  dredges 1013 

Penalties  on  Joplin  zinc  ores    1939 

products  at  Mill  148 1793 

Penn  and  Iron  City  mills,  plates  in 789 

mill,  stamps  in 229 

effect  of  rapid  drop  of  stamps    220 

Pennsylvania,  driving  mechanism  for  trommels    ....      357 

mill,  Grass  Valley,  Calif 2036 

Steel  Company,  Lebanon,  plant  of 1828 

Pepler  ore  feeder.  "   D.  J.  Pepler 2032 

Pepler's  operative  device  for  the  Challenge  feeder. 

D.  J.  Pepler 2031 

Perak,  Malay  Peninsula,  tin  washing  at 1182 

tin  dressing  at 1084 

Percentage  of  extraction  in  mills 1115,  1932 

moisture  in  ore    1 106 

opening  in  jig  screens 546 

screens  168,  369 

Percy,  C.  M.,  picking  belt  of  steel  plates 492 

reduction  in  rolls,  diagrams  of 1227 

shaking  riddles    385 

Percussion  tables,  bibliography  for   727 

Bartsch  rotary  1497 

belt    1496 

Perfection  laboratory  breaker 2009 

ore  feeder  1578 

Perforated  board  for  riffles 724 

in  classifiers 437 

plate  and  wire  cloth  screens,  for  medium  and 

fine  work    340 

plates  in  settling  tanks 453 

Peridotite  weathering  of 830 

Periods  of  clean-up  in  steam  stamps 134 

Peripheral  discharge  tube  mills  of  the  Davidsen  type  1297 
overflow,  depth  of  discharge  versus  velocity    of 

discharge 1413 

for  slime  tanks,  use  of  lead  strip  for  maintain- 
ing level    1406 

wood  strip  for  maintaining  level  . .    1407 

Periphery  speed  of  rolls 

Perm  mine,  mill 

works,  double  discharge  on  jigs  at 

Permeability  for  magnetic  lines   792 

of  iron 792 

Pernolet 101 

A.,  Carr  disintegrator 298 

Rexroth,  Lamarche  and  Schwarz  coal  jigs  . . .     641 

ribbon  theory  of  roll  capacity 101 

V.,  pneumatic  concentration 641,   837 

velocity  of  particles  falling  in  water  and  air    .     477 

Perseverance  furnaces  at  Mill  105 1637 

Pestarena,  Italy,  mill  at 1182 

Peter  McFarlane  Sons  Iron  Works  Company,  Horn 

rotary  slime  concentrator 1499 

Peters,  hammers  for  breaking 11 

spalling 11 

E.  D.,  Blake  breaker  at  Sudbury,  Canada    ....       57 

breakers    56,  57,  59 

copper  smelting xx 


1177 

584 


cost  of  breaking 

dust  chambers 

hand  versus  machine  breaking 
rolls  .. 


51 

885 
59 
109 

1569 
295 
234 
295 

1180 
295 
728 


Peterson,  G.  W.,  magnetic  separation  in  Sweden 

Pfeiffer,  J.,  Pfeiffer's  mill    

Pfeiffer's  horizontal  ball  mill    

mill,  bibliography  for 

Pfordte,  O.  F.,  concentration  at  Casapalca,  Peru 

edge  runners    

Frue  vanners 

Pheby,  F.  S.,  battery  frames 158,  228 

Phelps  breaker 58 

Philadelphia  &  Reading  Coal  Co.,  shaking  screens  342 

Graphite  Co.,  mill 1075 

Phillips 1035 

dry  gold  concentrator.     F.  B.  Allen   2025 

J.  A.,  amalgamation 787 

for  silver 1174 

amalgamating  pans 290 

arrastra 290 

gravity  stamps 223 

Krom's  rolls 109 

metallurgy    xx 

on  height  of  discharge 213 

silver  amalgamation 1039 

separation  processes 839 


2027 


73 


Phillips,  W.  B.  and  A.  Thies,  stamp  mill  at  Hailegold 

mine,  North  Carolina 1175 

concentration  in  Alabama 833 

of  Cranberry  ore  in  North  Carolina 1180 

cost  of  milling   1135 

magnetic  concentration  in  Alabama    833 

of  Cranberry  ore  in  North  Carolina .    .  835 

roasting  and  magnetic  separation  of  iron  . .    .  1176 

for  magnetism      814 

Wetherill  separator  in  Alabama 835 

Phlogopite,  specific  gravity  of 1189 

Phcenix  atmospheric  stamp     149 

mill   143 

false  bottoms  in  mortar  180 

inside  plates \\\  178 

mortar 165 

rate  of  crushing  in    165 

screens  in \\\  175 

mine,  stamp  at 140 

Phonolite  and  andesitic  breccia  crushed  in  Florence, 

Colorado 103 

Phosphate  dressing 1179,  1183 

in  Belgium  899 

Phosphates    in   Tennessee,    milling   of.      R.  D.  O. 

Johnson    

mill  for 

of  the  Pyrenees  

treated  by  hydraulic  nozzle 334 

in  log  washer 327 

washing 1 180 

Phosphor  bronze  cloth  screens   174 

plate  screens 174 

Phosphorus,  atomic  weight  of 1188 

Physical  properties  of  minerals 2 

adhesion     4 

change  of  magnetism  by  heat 4 

porosity  by  heat    4 

color  and  luster 3 

decrepitation    5 

greasiness 4 

hardness 2 

magnetism    4 

mineral  aggregation    3 

specific  gravity 3 

structure  and  fracture    3 

tenacity  and  brittleness    2 

Picker  for  slate   489 

Picking.     See  also  Hand  Picking. 

belts 1435 

at  mills  . . .  1438,  1617,  1737,  1749,  1806,  1815,  1842, 

1871,  1875,  1882,  1889 

detailed  information  on.     E.  H.  Messiter    . .  2021 

of  wire  at  Mill  137 1740 

Robins  conveying   1438 

speed  and  capacity  of 1438 

chutes   489 

cost  of  hand  picking 1438 

hand    480 

houses  492 

in  the  mine 481 

block  system    481 

of  rich  ore  for  economy 481 

on  conveyors    489 

shaking  table  489 

summary  of,  in  the  mills 491 

tables 485,  486,  488,  492,  1435 

annular  Allis-Chalmers  types    1435 

at  mills. .  . .  1783,  1786,  1787,  1792,  1795,  1805,  1920 

circular  revolving    490 

compared   491 

Humboldt    1437 

intermittent  motion  of   491 

Krupp  type    1435 

speed  and  capacity  of 1438 

of 491 

stationary 488 

Pickling  copper  plates 748,  754 

Pick  points,  removal  of 882 

Pictou,  H.  and  S.  E.  Linder,  action  of  arsenic  sul- 
phide solution  on  electrodes 1178 

powers  of  metallic  salts  on  arsenious  sul- 
phide    1178 

Pierce  amalgamators 1517,  1520,  2024 

at  mills 1517,  1660,  1661 

Mill  114,  saving  effected 1663 

W.  I.,  gold  milling  in  Nova  Scotia    1174 

Pierrefitte  mines,  France,  mill  at  1182 

Sautter  magnet  at 798 

Pike  Hill  mines 1891 

copper  handbook 1925 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Pilling  Air  Engine  Company,  pneumatic  hoists.  1608,  1610 
table  of  sizes,  capacities,   speeds,   weights, 

etc.    of 1609 

Pillow  blocks  for  rolls 71,  80 

Finder  concentrator    1479,  2022,  2023 

Pine  board  for  amalgamation 750 

for  riffles 721 

Hill  coal  washing,  Pennsylvania 2051 

Finite,  specific  gravity  of 1189 

Pipe  and  plug  jig  spigot    527 

conveyor 861 

covering    1091 

discharge  for  jigs 583 

at  Mill  137 1458 

distributors 857 

launders  at  Guanajuato 1595 

sampler , 845 

sizes  of    405 

steam  for  amalgamating  pans 243 

Pipes  for  gravity  stamps    199 

launders    873 

water 1106 

Pirchl,  J.,  Meinecke  classifier  and  spitz  utte    478 

Piston  in  jig  discharge 580 

of  Nordberg  steam  stamp   1247 

Pitch  angle  in  trommels 376 

for  smoking  moulds    784 

Pitkaranta,  Finland,  magnetic  separation  at 804,  836 

plant  at.     E.  Promosigh   2047 

Pittsburg  and  Montana  Copper  Company 1836 

coal  jig 2022 

washer,  drawings  of 2051 

Pittsburg  Foundry  and  Machine  Co.,  rolls    76 

Monarch  breaker  at 21 

Silver  Peak  Gold  Mining  Company    1634 

Placer  County,  California,  sizing  tests  of  stamp  pulp     211 

deposits,  testing  of.     R.  Nye  2036 

fields  of  northwest  America.    T.  Tonge 2040 

gold.    A  McDougall 2043 

burlap  processs  for  saving.    D.  Macquire  . . .   2041 

recovered  by  dry  panning 816,  825 

ground,  working  of.     J.  W.  Finder 2036 

machines,  dry 838,  839 

Tierra  Seca 838 

material  in  sluices,  mathematical  discussion  of  the 

action  of.    L.  St.  Rainier 2030 

mines,  cost  of  operation  of.     C.  W.  Purington. .  2047 
mining.     See  under  Hydraulicking. 

ancient  stream  gravel  in.     W.  Lindgren   ....  2041 

history  of.    J.  M.  Maclaren 2039 

in  Alaska.     C.  W.  Purington    ....  2042,  2045,  2047 

costs  of.     C.  W.  Purington 2041 

British  Columbia 2040 

California.     G.  L.  Holmes 2046 

Columbia,  S.  America.     F.  F.  Sharpless    . .   2037 

Guiana.    H.  Tweddle   2036 

Siberia 2046 

the  Philippines.     G.  D.  Rice 2036 

on  the  Yukon.     J.  M.  Bell    2047 

history  of    2035 

plants 1006 

of  La  Cienaga,  Sonora,  Mexico.     R.  T.  Hill  ...   2036 

Alaska.     L.  M.  Prindle  . , 2047 

the  Seward  Peninsula.     F.  H.  Moffit 2047 

tin  plants    1084 

washing 702,   723 

Placerville,  California,  mill  at 1017,  1022,  1035 

Placing  of  screens 170,    373 

the  mortar  in  stamp  mills   148 

Plain  copper  plates  coated  with  amalgam    747 

quicksilver    747 

comparison    of,    with    silver    plated 

plates 748 

transverse  troughs  or  riffles 772 

Plaminek,  A.,  air  blast  for  coal 838 

Hochstrate    apparatus    at  the   Rheinpreussen 

colliery    837 

Planet  mill,  bibliography  for 234,  294 

Plant  for  mill 1087 

Plaque  for  vanning 1152 

Plate  amalgam  ratio  of  gold  to  silver  in 764 

amalgamation 1611 

use  made  of,  in  mills 890 

annealing  of,  before  amalgamating   747 

conveyors   860 

picking  on    489 

gauges 1194 

glass  launder  linings 1595 

screens,  cost  of    361 

for  gravity  stamps 167 


Plate  screens,  stationary 340 

table  of  details  of   169 

thickness  of    371 

Plates,  absorption  of  amalgam 765 

mercury  by  amalgamating  plates 1514 

acid  water  on 751 

amalgamation    1512 

apron 740 

arrangement  of    737,  742 

bibliography  for 787 

buckling  to  remove  hard  amalgam    760 

cleaning 757 

coated  with  amalgam     747 

quicksilver    747 

connection  to  mortar 735 

copper  and  silver-plated    764 

versus  silver-plated   748 

details  of  dressing  and  cleaning 757 

dimensions,  area,  and  thickness 744 

distribution  of  amalgam  from 764 

distributors  and  collectors  743 

dressing  and  cleaning 756 

drops  between 733,  743 

due  to  cyanide,  loss  on.     B.  C.  Wilson    . , 2024 

effect  of  warm  water    750 

for  amalgamation,    plain   copper   versus   silver- 
plated.     E.  Halse 2024 

from  battery,  author  advocates  separating.     P. 

Morgan 2024 

graphite  coating  on 751 

grease  on    751 

gyrating 741 

how  fastened  to  table 735 

inside  amalgamated    178 

lip    739 

loss  of  gold  on 749 

maintaining  of  right  consistency    756 

materials  for  amalgamated   747,  1514 

method  of  electroplating 754 

miscellaneous 741 

Muntz  metal,  coated  with  mercury   750 

new  scheme  at  Mill  66 1026 

of  pure  silver  coated  with  amalgam    750 


on  mortar  lip 

splash  board 

vanners  and  bumping  tables 

outside  amalgamated 

position  of    

preparation  of  new  . . 
principle  of  action  . .  , 
proportions  of  gold  and  silver  caught  on. 


74 


739 
739 
740 
731 
737 
752 
731 
763 

removal  of  amalgam  from 757 

spots  and  stains 762 

rubber  for 754 

shaking 740 

sickening  and  flouring  of  mercury  on 751 

slope  of 744 

sluice 740 

sodium  amalgam  on 752 

speed  of  waves  and  thickness  of  film  on    746 

stains  on 750 

sulphuric  acid  used  on 752 

sweating  with  hot  water 759 

swinging 741 

tables  for    733 

treatment  of 750 

use  of  galvanic  couple  and  electric  current  on    .     752 

versus  mercury  wells 771 

wire  cloth  for  testing  screens    1138 

with  electric  current 740 

yield  of  hard  amalgam 761 

Platform  elevators 864 

for  gravity  stamps 156 

scales 883 

Plating  copper  plates  with  silver    754 

Platiniridium,  specific  gravity  of 1189 

Platinum  amalgam   730 

atomic  weight  of  1188 

deposits  of  the  Urals.     C.  W.  Purington 2033 

in  dredging,  the  saving  of     2040 

scrap,  recovery  of 1 146 

specific  gravity  of  native 1189 

pure 1189 

washing  in  Russia 2029 

Platt  mine  ore,  magnetic  separation  of 810 

Ploermel,  France,  mill  at 1177 

Plomb,  A.  M.,  results  from  the  Blake-Morscher  sep- 
arator       2028 

Plots  of  sizing  tests 1139,  1144 

Plotting  sizing  tests 1139 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Plug  spigot  for  jigs 598 

Plumb  circular  jig 641 

Plunger  clearance  on  jigs 529,  530 

feeders  at  mills 1749,  1750,  1751,  1853,  1857,  1864 

on  jigs 510,  511,  517,  528 

throw  on  jigs  553 

versus  centrifugal  pumps 868 

Plungers  and  sieves,  sizes  of  in  mills    529 

attachment  of  to  the  connecting  rods    529 

connecting  rods  for  in  jigs 530 

Plush  for  tables 703 

tables  on  dredges    1012 

Pneumatic  and  spring  stamps 113 

belt  concentrator 818 

products  of 818 

concentration 815 

See  also  Air. 

bibliography  for 837 

concentrator,  Hooper 820 

hydraulic,  and  spring  stamps 1246 

jigs,  Krom   824 

pulverizer 236 

bibliography  for 299 

separation  at  Mill  151 1804 

separators 1553 

Freid  gravity  dry-process  separator 1553 

Sutton,  Steele  &  Steele  dry  table    1479,  1554 

stamps 139,  224,  1257 

bibliography  for 143 

Hughes' 143 

Krause's 141 

Pocket  in  launders   873 

Poech,  F.  J.,  Siemens  and  Friedrichssegen  separators.  833 

Pointed  boxes    412-416,  439,  475-477 

at  Friedrichssegen 450 

details  of 441 

Rittinger  type    411 

tube  classifier 421 

Pole  pieces  for  magnets 794 

Poles  of  magnets 791 

Polybasite.  specific  gravity  of 1189 

Pomeroy  dredge    1013 

Ponds  for  water 1105 

Pontoon  in  hydraulicking    1006 

Poor  ore  treated  separately 1111 

Porcelain  lining  for  Alsing  cylinder 267 

Porosity  changed  by  heating 4 

roasting  for 828,  890 

Porphyry,  strength  of 301,   302 

weight  of 1190 

Portable  belt  conveyor  at  Mill  135   1735 

conveyors  at  Mill  167 1857 

stamp  mill   226 

Portage  Lake  foundry 1446 

Porter-Allen  engine 1071 

Dwight viii 

electrolytic  dissociation  of  slimes 1414 

J.  A.,  gold  stamp  mill  at  the  Smuggler  Union 


mine,  Telluride,  Colorado 
J.  B.,  tabulated  results  of  crushing  tests    . . . 
S.  R.,  Baliol  mill,  Sutters  Creek,  California. 
Port  Henry  iron  ore  concentrated  by  magnets    . . 
magnetite  crushed  by  Sturtevant  mill 
sizing  test  on . 


1176 
2017 
1184 
802 
288 
100 

ore,  magnetic  separation  of 798,  810 

Portland  mill,  Colorado  City,  Colorado 2044 

Cripple  Creek,  Colorado,  practice  at  the 2042 

Port  Oram,  New  Jersey,  mill  at    1055 

Position  of  amalgamated  plates 737 

Postlethwaite,  R.  H.,  dredging 2041 

Kia  Ora  dredge,  Feather  River,  California. .     1184 

Posts  for  gravity  stamps    153 

Potash  for  cleaning  mercury    786 

Potassium,  atomic  weight  of    1188 

amalgam 730 

Pot  distributor 858 

retorts 781 

Potter  notation  process    1555,  1561 

D.  Clark 1568 

testing  for 1993 

Pound,  equivalents  of 1187 

of  water    1187 

per  square  inch  1188 

troy   1187 

Powell,  F.,  gold  dredges  on  Snake  River,  Idaho    ...   1181 

the  black  sand  problem 1511 

Power.     See  Horse-power. 

amalgam  squeezer 1519 

and  efficiency  of  stamps 131 


75 


Power  and  Mining  Machinery  Co.,  improved  Hunt- 

ington  mill   1311 

range  of  adjustment  of  gyratory  breakers  1218 

rolls  1244 

at  Mill  166 1856 

size  of  crushed  products  from  breakers    .  1218 
surface  measurements  in  stone  crushing  by  Von 

,  Reytt 306 

applied  to  belt  conveyors 860 

computed  for  concentrator  No.  1,  Mill  173 1929 

r  r     ,  1930' 

cost  of  for  breakers 50 

crushing 315 

in  pan  amalgamation 250 

data  in  regard  to  1927 

effect  of  strength  and  specific  gravity  on   313 

for  Alsing  cylinder    267 

amalgamating  pan    249 

arrastra 238,  239 

ball  mill    261 

Ball-Norton  magnet 798 

bucket  conveyor 861 

buhrstone  mill 253 

breakers    56 

Brink  &  Hiibner  disintegrator 286 

Bryan  mill   272,  273 

Cammett  table 677 

centrifugal  pumps 869 

clean-up  pans    252 

cone  mill 256 

Cylcone  pulverizer 289 

Delvik-Grondal  magnetic  separator 804 

Dodge  pulverizer 262 

Edison  magnetic  separators 813 

electroplating  copper  plates 755 

Ferraris  magnetic  separator    799 

Fraser  and  Chalmers  rolls 97 

Frisbee  Lucop  mill 267 

gravity  stamps 204 

Griffin  centrifugal  stamp  mill : 269 

roller  mill  283 

Hancock  jig 505 

hand  electromagnet 812 

Heberli  mill 258,  259 

magnetic  separator 799 

Hooper  air  jig 822 

Huntington  mill  280,  281 

jigs 596,  597 

Krom  air  jig    824 

Langley's  dry  crusher 274 

magnetic  separator  used  at  Monteponi 810 

mechanical  batea 683 

mills 1089 

See  Individual  Mills  in  Chapter  XX. 

movable  sieve  jig  at  Przibram 500 

Narod  pulverizer 282 

Pape-Henneberg  dry  separator 820 

picking  table    490 

rolls  97,  112 

Salzburg  table 683 

sample  grinder 257 

Sautter  magnetic  separator   798 

Schmidt  spiral  screen 363 

Schranz  mill  275,  276 

settlers  . 779 

shaking  screen 345 

stamps,  calculation  of.    A.  W.  Warwick 2044 

steam  stamps,  table  of     131 

Stedman  disintegrator    286 

Sturtevant  mill 288 

trommels 357 

Tustin's  mill    262 

vanners     663 

and  slime  tables  compared   692 

wash  trommel    330,   3o2 

Wenstrom  magnetic  separator    802 

Wetherill  magnetic  separator    805,  807,  808 

Whelpley  &  Storer  pulverizer    289 

house  for  mill 1087 

in  crushing.     E.  A.  Hersam 1340 

jigs,  Bilharz  circular  sieve 504 

continuous  movable  sieve    499 

Hooper  vanning 505 

intermittent  movable  sieve 506 

Robinson  movable  sieve 504 

Schranz 503 

measures  of    1188 

of  Blake  and  Dodge  breakers  compared    35 

Cummings  granulating  mill 255 

gravity  stamps 219 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Power  of  Husband  stamp  ........................      141 

rock  emery  mills   .........................     255 

rolls     ...................................      108 

plant  at  mills..  1639,    1675,    1680,    1698,    1709,    1712, 

1723,  1730,  1757,  1768,  1794,  1802,  1827,  1830,  1835, 

1856,  1859,  1863,  1871,  1874,  1887,  1895,  1899,  1906, 

1912,  1913,  1914 

required  by  agitators  at  Mill  103  .............    1634 

Allis-Chalmers  suspended  frame  vanners  .  .    1503 

toothed  and  corrugated  rolls,  table  of  .    1243 

Alsing  tube  mills,  table   .................    1296 

American  Process  Company  driers    .......    1599 

Austin  gyratory  breakers,  table  of  ........    1210 

automatic  tripper  at  Mill  174  ............    1883 

ball  mills  at  mills    ..................  1830,  1914 

Ball-Norton,    belt-type   magnetic   separator 
at  Mill  158  ..........................    1825 

drum-type  magnetic  separator  at  Mill  158  1822 
type  "M"  magnetic  separators    ........    1825 

Bartlett  Simplex  concentrators   ...........    1487 

Bartsch  rotary  percussion  table   ..........    1497 

belt  conveyors  at  mills.  .  .  .  1634,  1667,  1690,  1691, 

1707,  1709,  1768,  1769,  1771,  1772,  1853,  1882, 

1883 
percussion  table  ......................    1496 

Blake  breakers  at  mills..  1618,  1634,  1742,  1749, 

1821,  1882,  1883 

Blake-Morscher  electrostatic  separator  ....    1551 

Bleichert  aerial  tramway  at  Mill  130  ......    1723 

breakers  at  Mill  144  ....................    1771 

Bryan  mills  at  Mill  173.  ..  1879,  1928,  1929,  1930 
Butters  centrifugal  agitating  pump  at  Mill 

Card  tables"  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  .'  '.'.'.'.  '.  '.  '.'.'.'.  '.  '.'.'.'.'.'.   1484 
at  mills  .......................  1769,    1777 

centrifugal  pumps  at  mills.  .  1634,  1688,  1694,1695, 

1696,  1711 

Chalmers  &  Williams  vanners  at  Mill  122.  .  1687, 

1688 
cleaner  jigs  at  Mill  148  ..................    1793 

Cleveland-Knowles  magnetic  separators  .  .  .    1542 
cobbing  magnet  at  Mill  164  ..............    1849 

Cole  shovel  wheel  at  Mill  124    ...........   1693 

conveying  and  picking  belt  at  Mill  139  ...  1749 
crushing  ..............................  1334 

plant  at  Mill  174  .....................    1883 

Davis  rolls  at  Mill  144  ........  1771,  1773,  1774 

Denver  Engineering  Works  Company's 

Blake  breakers,  table  of  ...............    1204 

Ding's  magnetic  separators  ..............   1541 

at  Mill  140  ........................    1759 

disc  conveyor  ..........................    1583 

dredges  ................................    1654 

elevators  at  mills.  .  .  .  1690,  1691,  1693,  1707,  1715, 

1727,  1728,  1729,  1743,  1769,  1771,  1772,  1774, 

1830,  1853,  1854,  1883,  1928,  1929,  1930 

Elmore  vacuum  oil  process  .........  .....    1558 

Evans  jigs  at  Mill  162  ..................    1930 

Farrel-Blake  breakers  at  Mill  124  ........    1690 

table  of  .........................   1200 

Ferraris  ball  mills,  table  of  ..............  1300 

magnetic  separators     .............  1525,  1527 

table  at  Mill  146    ....................   1786 

tables  of   ..........................    1490 

Forsgren  magnetic  separator  .............    1539 

Prayer  pump  at  Mill  159    .....  ..........    1830 

Frenier  spiral  sand  pump  at  Mill  126  .....    1708 

Frue  vanners  at  mills  ____  1694,  1695,  1929,  1930 

Galena  roaster  .........................    1548 

Garland  disc  conveyors  at  Mill  124    ......   1695 

Gates  ball  mills,  table  of  ................  1301 

breakers  at  mills  .......  1635,  1706,  1713,  1727, 

1768,  1830 

style  "K"  breakers  table  of  ............    1208 

Gebriider  Sulzer  centrifugal  pumps  at  Mill 

118  .................................   1678 

gravity  stamps  .........................    1274 

Griffin  mills  at  Mill  105    ................    1636 

Grill  4-compartment  driers  ..............    1596 

grinding  pans  at  mills     .............  1638,  1723 

Grondal  magnetic  separators  ............  1537 

at  mill  159  ......................  1828,    1830 

Hadfield  breakers  at  Mill  130  ...........  1719 

gyratory  breakers  at  Mill  130  ..........    1723 

Hancock  jigs  ..........................  1441 

at  Mill  162  ..........................    1930 

1296 


erey  conveyor  a  ............. 

swing  hammer  pulverizers,  table  of  ..... 

jigs  at  mills     ............  1707,  1708,  1929, 

Kennedy  gyratory  breakers,  table  of  ...... 


Hardinge  tube  mills 
Harz  jigs  at  mills..  1692,  1693,  1694,  1728,  1729, 
1772,  1773,  1774,  1775,  1877,  1878,  1879 
Hathaway  gyratory  breakers,  table  of  .......  1217 


Power  required  by  Horn  rotary  slime  concentrator  .  .    1500 
Humphrey  rolls,  table  of  ................    1235 

Huntington  mills  at  mills.  .  1669,  1686,  1687,  1688, 

1689,  1753 
improved  Huntington  mills,  table  of  ......    1312 

individual  machines  at  Mill  139  ..........    1757 

Mill  154   ........................    1816 

International  magnetic  separators    ........    1535 

at  Mill  138  ................  1746,  1747,  1748 

James  table   ...........................    1491 

Jeffrey  conveyor  at  Mill  126  .............    1706 

1322 
1930 
ey  gyratory    reaers,  tae  o    ......    1214 

Kent  roller  mill  ........................    1304 

Knowles'  New  Century  magnetic  separators, 
table  of  .............................    1542 

Krogh  pumps  at  mills    ........  1634,  1929,  1930 

Krupp  ball  mills  at  Mill  128    ............    1714 

gyratory  breakers,  table  of    ............    1215 

Linkenbach  table  at  Mill  146  ............    1786 

magnetic  separators  at  Mill  152  ..........    1814 

May  Brothers'  jigs  at  mills  .........  1714,  1723 

McCully  gyratory  breakers,  table  of  ......    1212 

breakers  at  Mill  139  ..................    1749 

McLanahan  and  Stone  single-roll  crushers, 
table  of  .............................    1241 

Mill  97   ...............................    1621 

101  .................................    1629 

105  .................................    1639 

111  .................................    1656 

114  .................................    1664 

117  .................................    1676 

118  .................................    1679 

120  .................................    1685 

123  .................................    1690 

126  .................................    1709 

128  .................................    1715 

130  .................................    1723 

132  .................................    1730 

138  ............................  1745,  1746 

141  .......................  1759,  1760,  1762 

142  ...............................  .  .    1768 

145  ............................  1782,  1783 

146  .................................    1786 

147  .................................    1792 

150  .................................    1802 

151  .................................    1804 

153  .................................   1815 

154  .................................   1816 

155  .................................   1817 

157  .................................   1820 

158  .................................   1823 

159  .................................    1830 

161  .................................    1840 

162  ............................    1847,  1930 

165  .................................    1852 

166  .................................   1856 

169  .................................    1865 

171  .................................    1871 

174  .................................    1887 

175  .................................    1891 

177  .................................    1894 

178  .................................    1897 

179  ..  ..................    1899 

180  .................................    1906 

183  .................................   1914 

184  .................................   1914 

186  .................................   1918 

Monadnock  Chili  mills  at  Mill  144  .......    1775 

Morris  centrifugal  pumps  at  Mill  139  .....    1757 

New  Standard  concentrator  ..............    1479 

Nordberg  steeple-compound  steam  stamp  at 

Mill  180   ............................    1901 

Overstrom  tables  at  Mill  132  ............    1730 

at  Mill  162  .....................   1930 

picking  belts  at  Mill  174  ................    1882 

raff  wheels  at  Mill  128  ..................    1715 

revolving  driers  at  Mill  161    .............    1762 

Riblet  aerial  tramway  at  Mill  124  ........    1696 

rigid  rolls  at  Mill  181  ...................    1906 

Robins  belt  conveyors  at  mills.  .  1636,  1637,  1750, 

1830,  1876 
Robins  conveying  and  picking  belt  at  Mill 

132  ..  .......................    1727 

rolls  at  mills.  .1690,  1691,  1693,  1707,  1711,  1714, 

1727,  1742,  1743,  1749,  1750,  1751,  1752,  1830, 
1877,  1883,  1928,  1929,  193Q 
sampling  department  at  mills  .......  1667,    1884 

Samson  breakers,  table  of  ...............  1203 


76 


Pages  1199-1610,  Vol.  III. 

Power  required  by  sand  wheels  at  Mill  117. .  1668,  1669, 

scraper  conveyor  at  Mill  126  

screw  conveyors 

at  Mill  105 

shaking  feeders  at  Mill  124 

grizzly  at  Mill  124    

launders  at  Mill  124 1693, 

Sherman  regrinders  at  Mill  132 1728, 

simple  steam  stamp  at  Mill  182 

stamps  at  mills 1618,  1624,  1634,  1668, 

Stroud  mills,  table  of 1320, 

Sturtevant  balanced  rolls,  table  of 

Dodge  type  breakers,  table  of    

emery  mill  at  Mill  186 

rotary  breakers  at  Mill  186 

testing  plant  at  Mill  141 

trommels  at  mills.  .1690,  1691,  1692,  1693, 
1707,  1714,  1742,  1743,  1749,  1750,  1751, 
1771,  1772,  1773,  1774,  1830,  1928,  1929, 

tube  mills  

at  mills 1634, 

Turbo  log  washer  at  Mill  154 

Ullrich  magnetic  separator    

vanner  at  mills    1634,  1778, 

various  groups  of  machines  at  mills .  .  1706, 

1835, 

Vezin  samplers  at  mills      1691, 

Wetherill  magnetic  separators 

Rowand  magnetic  separators  at  Mill  141 
Wharton  magnetic  cobber  at  Mill  157   .... 

Wild  roller  mills,  table  of 

Wilfley  slimers 

at  Mill  132 , 

tables  at  mills  . .  1625,  1634,  1669,  1687, 

1694,  1695,  1708,  1715,  1729,  1744, 

1777,  1929, 

Woodbury  concentrators   

at  Mill  117 

Worthington  centrifugal  pump  at  Mill  138 

at  Mill  175 

rule  for 

sources  of  losses  in  crushing 

summary  for  Mill  124   

tests  at  Mill  173  

transmission 

by  rope  

transmitted  by  belts 

used  by  breakers 

rolls  

steam  stamps 

for  breaking 

friction  of  piston  on  water 

on  jig  walls 

inertia  of  starting    

lifting  sand 

mechanical  friction  

oscillatory  action 

work  of  drawing  the  returning  water  down 

in  crushing 

jigging 

Practical  limits  of  settling  in  settling  tanks 

Practice,  roasting  practice  in  Wisconsin 

Praseodymium,  atomic  weight  of 

Pratt  ore  sizer 

A.  H.  Wethey   

at  Mill  164    1346, 

-Wethey  screen 

Precipitating  agents  for  slimes 

Precipitation  of  gold  solutions  at  Mill  117 

Prehnite,  specific  gravity  of 

Preliminary  breakers,  classification  of 

crushing    

bibliography  for 

blasting  in  the  mine 

breaking  by  hammers 

calcining  for  friability  with  or  without  quench- 
ing by  water 

machines 

methods  of 

washers 319, 

bibliography  for 

purpose  and  classification   

Premier  diamond  mine    

mill,  plates  in 

Premium  for  picking  rich  ore 

Prentiss,  G.  W 

screen  gauge  

F.  H.,  the  Elmore  notation  process  . . 
Preparation  of  new  amalgamated  plates    . 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


173, 


1894 
1709 
1583 
1637 
1691 
1690 
1694 
1729 
1909 
1679, 
1769 
1321 
1234 
1205 
1918 
1917 
1766 
1706, 
1752, 
1930 
1289 
1770 
1816 
1535 
1930 
1780, 
1836 
1750 
1525 
1763 
1819 
1304 
1506 
1729 
1688, 
1745, 
1930, 
1496 
1669 
1745 
1890 
1092 
1325 
1698 
1927 
1174 
1094 
1093 
53 
97 
310 
50 
603 
602 


455 
1548 
1188 
1345 
1360 
1850 
2018 
1416 
1673 
1189 
1200 
9 
55 


318 

9 

1341 

334 
1341 
1922 

788 

481 
1195 
1194 
1569 

752 


Preparation  of  pulp  previous  to  amalgamation 1514 

Preservation  of  belts 1094 

tailings    1114 

Preserving  timber  for  mortar  blocks 147 

Press  for  graphite  1075 

Presses  for  amalgam,  Chalmers  and  Williams  power 

press    1519 

Krupp  press  1518 

Pressure  box  in  classifiers 419 

exerted  by  rolls 311 

machines  compared  with  grinding 313 

measures  of    1 188 

of  rolls 108 

springs  on  rolls 73 

Preston,  E.  B.,  amalgam 788 

amalgamated  plates 733,  735,  745 

arrastra 290 

Blake  and  Gates  breakers 58 

breakers 58 

Bryan  mill   295 

California  gold  stamp  mills 1 179 

gold  mill  practice    1278 

clean-up  barrel 294 

pan    291 

Gates  hydraulic  classifier 477 

gravity  stamps 228 

Griffin  roller  mill    297 

Huntington  mill    297 

mercury  traps    774 

order  of  drop  of  gravity  stamps 1274 

shaking  plates 741 

stamping 225 

vanners  663 

stone  breaker 2009 

Prichard,  W.  A.,  definitions  of  slime 1398,  1419 

Primosigh,  E.,  separator  at  Pitkaranta,  Finland 836 

Principles  and  purposes  of  gravity  stamps 1262 

rolls «2 

governing  costs    1940 

of  action  of  breakers  compared 52 

classifiers 387,  1368 

Wilfley  table  group 1465 

amalgamated  plates    731 

crushing  machines 300 

deep-pocket  classifiers    409 

electrostatic  separation    1199,  1549 

flotation  processes    1199,  1555 

gravity  stamps 144 

hindered  settling 610 

jigs 494 

magnetic  separators    1521 

mechanical  sampling    1574 

operation  of  Wilfley  slimer   1504 

order  of  drop  of  stamps 215 

ore  dressing,  general 1 199 


1611 
139 

1460 
231 

1224 


summary  of 
pneumatic  and  spring  stamps 

pulsion,  general 

pulverizers    , 

roll  crushing 

sampling    843,  849 

screen  sizing 366 

bibliography  for 384 

separation,  combined 891,  1611 

stamps   113,  1246 

suction 1461 

vanner  separation 665 

Wilfley  table 670 

supplementary  5 

used  in  mills    889 

Prinz  and  Rau  dust  collector  at  Mill  141    1765 

Prism  form  of  trommels    361 

Prister,  A.,  slime  settling 1178 

Prize  mill,  acid  water 173 

Probert,  F.  P.,  comparison  between  Bryan  mills  and 

rolls  for  crushing  jig  tailings 1323 

sizing  tests  on  Bryan  mills    1323 

F.  H.,  concentration  of  copper  ore 1419,  1997 

in  Arizona 2033,  2037,  2041 

custom  mill  in  Ontario    2040 

primitive  Mexican  mill 2038 

Process,  testing  for 1161 

Processes,  flotation,  principles  of  1199 

of  separation,  miscellaneous 790 

Product  of  Blake  and  Dodge  breakers  compared  ...       36 

breakers,  size  of  crushed  1218 

table  of  sizing  tests  of 45 

Hancock  jig  505 

hand  jigs 498 

picking    486 


77 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Product  of  jigs 553,   590 

spindle  and  jaw  breakers ; 53 

Wihley  roasting  furnace,  fines  sink  in  water   .    1547 

treated  by  rolls    63 

Profit  in  concentration 1118 

tailings  piles 1114 

maximum  1117 

Progress   Mining  Company,  Mexico,  jigging  at  the 

mill  of  the.     A.  C.  Mahl 2045 

of  ore  dressing 1119 

Progressive  pulverizer .' 236 

bibliography  for i 

Properties  of  mercury 730 

Propfe  mill 235 

bibliography  for 297 

Proportions  between  parts  of  stamps    189 

of  gold  and  silver  on  successive  plates 763 

stamps 190 

Proprietary  mine 1715 

Proustite,  specific  gravity  of 1189 

Providence  mill,  Webb  City,  Missouri.    D.  T.  Board- 
man  ! 2039 

plates  in  789 

shoes  in 181 

stamps  in 230 

wear  of  shoes  and  dies  in   183 

Provis,  Richard  and  H.  W.  F.  Kayser,  tin  dressing  at 

Bischoff,  Tasmania _ 1182 

Prus,  G.,  magnetic  concentration    1182 

plant  at  Mercadel,  Kessler  and  Vial  separators  835 

Prussian  mine,  air  separation  at     820 

Przibram,  Bohemia,  mill  at    1180 

breaker  at 57 

center  discharge  at 582 

classifiers  at 476,  477,  478 

feeders  at   884 

hand  picking  at 492 

Heberli  mill  at 259 

jig  connecting  rods  at 530 

feeder  at 549 

screens  at 540 

jigs  at    597,  640,  641 

magnetic  separator  at 812 

magnets  at  . .  833,   836 

mill  at 1096,  1174,  1176,  1177,  1185 

moisture  in  ore    1107 

movable  sieve  jig  at 499 

ore,  sizing  test  of  breaker  product  of   _ 47 

work  necessary  for  crushing  one  kilo  of  differ- 
ent sizes  of 308 

power  at 1089 

for  jigs  at  603 

trommels  at   357 

picking  at 487 

removal  of  jig  tailings  at 588 

roasting  for  magnetism  at 815 

rolls  at    110,  111 

Salzburg  table  at 683 

slope  of  jig  sieves  at 548 

spitzlutten  at    423 

stamps  at    224,  225,  229 

stroke  of  jigs  at 594 

tables  at    728,  729 

tests  on  work  required  for  crushing  ore  at 305 

trommels  at   385 

Psilomelane,  specific  gravity  of 1189 

Pulley  for  gravity  stamps    197 

jigs 532 

steam  stamps 128 

in  gravity  stamps    128 

Pulp  bed  on  vanners 661 

consistency  for  Wilfley  tables  and  vanners 1848 

current  in  amalgamating  pans 245 

density  for  slime  tables 695 

for  vanner  feed   - 660 

in  amalgamating  pans   246 

thickeners 1394 

amount  of  tank  room  required  per  ton  of  mate- 
rial treated.     Mill  173 1413 

at  mills 1413,  1880,  1885 

Ayton  intermittent  thick  pulp  extractor    ....    1408 

Berenger  and  Stingls  slime  tank 1407 

Callow  cone  1402 

classification  of    1401 

Colorado  Iron  Works,  slime  tanks 1407 

De  Kalb's  perforated -board  classifier      1402 

Merrill  cylindrical  clarifying  tanks    1406 

large  cones  1406 

Richards-Shepard  spitzkasten 1401 

Sherman  tanks 1404 


Pulp  thickeners  used  at  Mill  173  ................. 

Pulsating  screens    ...........................  342, 

Centripact  screen  ......................... 

impact  screen  ............................ 

Imperial  ore  screen  ....................... 

in  the  mills  .............................. 

Newaygo  separator  ....................... 

Vibracone  separator  ....................... 

Pulsator  classifier  at  Mill  175  .................... 

direct  form  .............................. 

Richards'    ............................... 

use  with  jigs  and  tables  ................... 

house  for  diamonds    ........................ 

jig,  Richards'   .............................. 

table  of  sizes,  capacities,  and  dimensions  .  . 
Pulsion  and  suction  in  jigging    ................... 

investigated  in  the  mills  ................. 

on  air  jigs  ............................. 

hand  jigs  ............................ 

jigs  ,  ................................ 

adjustment  of  ...................... 

tests  on  ............................... 

general  principles  of  ........................ 

in  jigs   .................................... 

jigs  ...........................  518,  520,  538 

definition  of  .............................. 

for  hindered-settling  tests    ................. 

velocity  in  jigging  .......................... 

Pulsometer  pump  .............................. 

Pulverizers,  Bartle    ............................. 

bibliography  for  ............................ 

Cunnack's  ................................. 

Cyclone  ................................... 

bibliography  for  .......................... 

detailsof  .  ...  .............................. 

Dodge  improved  ............................ 

Griffin  .  .    ................................. 

Rowland  No.  1,  bibliography  for  ............. 

Jordan's   .................................. 

Leviathan  ................................. 

Meihe's  ................................... 

Men-all's,  bibliography  for  ................... 

Michell  and  Tregoning    ..................... 


1408 

1348 

1352 

1351 

1348 

1346 

1350 

1352 

1890 

1391 

1388 

1478 

1081 

1453 

1455 

1460 

632 

826 

499 

533 

598 

628 

1460 

494 

,  610 

558 

623 

1460 

871 

294 

289 

293 

288 

298 

232 

262 

299 

297 

299 

299 

299 

296 

292 


78 


. 

Nicholas,  bibliography  for  ...................  292 

other  than  gravity  stamps  ...................  231 

penumatic,  bibliography  for   .................  299 

principles  of  ...............................  231 

purpose  ol    ................................  ff  • 

Thompson's,  bibliography  for  ................  294 

Tregoning  .................................  297 

Walker    .    .................................  299 

Whelpley  and  Storer  ......................  289,  299 

Pulverizing  mill,  Tustin's  rotating  ................  2b2 

Pumice  used  in  cleaning  copper  plates  ............  754 

Pumping  costs  at  Mill  180   ......................  1906 

plant  at  mills  .....  1709,  1757,  1859,  1881,  1895,  1899, 

water  .....................................  '  H05 

Pumps,  bibliography  for   ........................     884 

centrifugal    ................................    }°10 

sand  ....................................    1588 

displacement    ..............................    1( 

for  handling  pulp,  centrifugal  and  Frenier  .....    1610 

sand  and  water  ...........................     868 

water  supply    ............................     871 

in  mills.     See  Individual  Mills  in  Chapter  XX. 

Oregon,  five  step  .........................   2033 

Lancaster  rotary  ............................    l^9 

sand  ......................................    1587 

versus  sand  wheels  in  Witwatersrand    ......  .  .  .    1645 

Punched  plate  jig  screens  at  mills    ...........  1792,  1869 

screens  ..................................     38a 

compared  with  wire  cloth  ..............  171,  35 

Punching  screens  ...............................     223 

Punchings  for  jig  beds  at  Mill  127  ................    1459 

Purification  of  mercury    .........................     785 

Purington,  C.  W.,  dredging  in  Siberia   ............   2035 

platinum  in  the  Urals  .....................   2033 

Purity  of  concentrates  ...........................    11  18 

Purpose  of  classifiers    ........................  389,  1367 

jigs  ...................................  494,  552 

affecting  number  of  sieves  ...............     589 

preliminary  washers  .......................   1341 

pulverizers    ..............................     231 

rolls  ....................................       62 

stamps    ..............................  113,  1246 

power  and  capacity  of  Huntington  mill   .......     280 


Pages  1199-1610,  Vol.  III. 

Purtscher,  E  ................................... 

Push  conveyors  ............................  1582, 

at  Mill  105  .............................. 

feeders  at  mills     .......................  1581, 

Pushing  block  feeder   ........................... 

Putting  on  new  shoes  ........................... 

Putty  knife  for  scraping  plates   ................... 

Pyramid  form  of  trommels    ...................... 

Pyrargyrite,  specific  gravity  of  .................... 

Pyrite  and  blende  separation  ..................... 

angle  of  nip  required  to  crush  ................ 

concentration  in  New  York  .................. 

crushed  in  Mill  13  .......................... 

dressing  in  Massachusetts.     J.  J.  Rutledge   ---- 
plant  of  the  Verein  Chemischer  Fabriken    .  .  . 

for  jig  beds  ................................ 

in  New  York  ,  concentration  of  .   R.  Brinsmade    . 

mill  for     .................  904,  905,  958,  961, 

milling  in  New  York  ........................ 

ore,  mill  for  .................  900,  909,  910,  913 

test  on  .................................. 

weight  of  ................................ 

rendered  magnetic  by  heat  ................... 

roasted  for  magnetism    ...................... 

porosity  ............................... 

specific  gravity  of    .......................... 

with  quartz  and  porphyry  crushing  in  Mill  20.  .. 
Pyrolusite,  specific  gravity  of  ....  ................ 

Pyrometer  for  regulating  temperature  in  Wilfley  fur- 
nace .................  ....................... 

Pyromorphite,  specific  gravity  of    ................. 

Pyroxene,  specific  gravity  of   ..................... 

Pyrrhotite,  hindered  -settling  test  on  .............  617 

settling  velocity  of  ........................  466 

specific  gravity  of 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


1185 
1584 
1637 
1636 
855 
201 
762 
361 
1189 
900 
94 
2038 
47 

2038 
1914 
574 
2037 
965 
2047 
,  915 
1165 
1190 
814 
1544 
828 
1189 
95 
1189 

1548 
1189 
1189 
,  619 
,  469 
1189 


Quaker  mine,  Huntington  mill  at 281 

Quality  of  copper  for  plates 747 

crushing  by  breakers   47 

rolls     ... 98 

feed  for  vanners    658 

product  of  Blake  and  Dodge  breakers  com- 
pared           36 

work  of  classifiers  461 

trommels 380 

Quantity  crushed  by  rolls '• 

of  hydraulic  water  in  jigs 598 

water  for  stamps 221 

in  rectangular  launders    878 

on  circular  slime  tables 694 

vanners  659 

Quart,  equivalents  of     1187 

Quartering,  coning  and 1577 

for  sampling 844 

Quartz  and  galena,  jig  tests  on 629 

used  for  film-sizing  tests   707 

sphalerite,  jig  tests  on   628 

angle  of  nip  required  to  crush  94 

film-sizing  tests  on     707 

free-settling  velocity 471 

grinding  of 2017 

hindered-settling  test  on 617,  622 

in  Banner  mine 148 

mill,  Bryan  roller    271 

ore,  capacity  of  Tremain  stamp  for 138 

pulsion  jig  test  on 624,  625 

pyrite  ore,  treated  by  Summit  Mining  and  Smelt- 
ing Company 674 

separating  chalcopyrite  or  blende  from 720 

separation  from   gold   by  amalgamated   copper 

plate    

settling  velocity  of 466,   469 

specific  gravity  of 1 189 

treated  by  Dodge  improved  pulverizer 262 

in  Mill  4...    ....    502 

weight  of 1160,  1190 

Quartzite,  picked   from  gold  in  rock  houses  in  the 

Rand,  South  Africa    482 

strength  of  301 

Quebec  asbestos  dressing  practice   1916 

Queen  &  Co 1159 

Mary  colliery,  centrifugal  apparatus  at    820,  838 

Quehant,  Ch.  and  O.  Dupont,  dressing  lead  and  zinc 

in  Belgium 1185 

Quenching  for  breaking  rock  after  heating  9 

Quicklime  in  retorting  mercury 785 

Quicksilver.    See  Mercury. 
'     mill  for 1177,  1183 


Quicksilver  ore,  dressed  at  Idria,  Austria 

_  ores  the  dressing  of,  

Quincy  granite,  result  of  crushing 

mill,  stamps  in , 

Hubbell,  Michigan 

practice  of  the.    C.  K.  Hitchcock,  Jr. 


481 
1074 
33 
230 
2041 
_,._.  2037,2047 

Mining  Co 1181,  1908 

copper  handbook 1925 

mill    xxvii,  998 


R 

Rabprg,  W.  A.,  separating  graphite  from  gangue. . . 

Radiators  for  heating 

Radium,  atomic  weight  of 

Radius  of  slime  tables 

Raff  wheels 864, 

at  Mill  128 

for  new  Humboldt  concentrator 

Wilfley  table 

Rag  frames  1083, 

Raglan  Township,  Ontario,  mill  at 

Raibl,  mill  at    1177, 

rolls  at 

Salzburg  tables  at 

Railway  Master  Mechanics  Association  on  screen 

gauges  

Rain  to  settle  dust   

Rainy  River  district,  Ontario,  mill  in 

Rakes  for  discharging  jig  concentrates 

Ramsbeck,  hand  picking  at    

Luhrig  table  at  

mill  at     1086,  1102,  1121, 

picking  at 

sieve  scale  at  

Ramsey  sludge  tank 

Rand,  cost  of  hand  picking  on  the   

district,  circular  tables  in 

sampling  in    

tailings  wheels  in 

weight  of  quartz   

hand  picking  on  the 

metallurgical  practice 

G.  A.  and  H.  S.  Denny    

mill  equipment.    G.  A.  and  H.  S.  Denny 

milling  practice 

mills  on  the   

ores,  slimes  from 

slime  treatment  on  the 

Randolph,  J.  C.  F.,  amalgamation  plant  at  Batopilas 

Chihuahua, 

Blake  breaker  at  Clausthal 

breakers    

dressing  at  Clausthal 

gravity  stamps 

Harz  jigs  at  Clausthal 
pointed  boxes  at  Clausthal 

rolls  at  Clausthal 

stroke  of  jigs     

trommels  at  Clausthal   

mill,  acid  water 

Range  of  sizes  fed  to  jigs    

Rapid  City  chlorinatlon  works,  trommels  at 

Economy  individual  mortar •  •  • 

stamp 1261, 

a  camless  stamp   :  •  • 

Mill     Company,    Rapid     Economy  spring 

stamp 1261, 

Rasch,  ball  mill  of  Siller  and  Dubois 

Rate  of  travel  of  ore  in  trommels    ........ 

Ratio  between  quartz  and  galena,  hindered  settling  . 
total  horse-power  and  that  to  overcome  gravity 

in  gravity  stamps 

for  currents  in  testing  classifiers 

free  to  hindered  settling 

hindered  settling 

from  experiment    

theoretical  value  for •  •  •.  •  •  •  •  •  •  • 

of  concentration.     See  Individual  Mills  in  Chap- 
ter XX. 

feed  to  space  between  rolls 

gold  to  silver  caught  on  successive  plates  .... 

reduction  for  rolls 

gyratory  breakers    

sieve  hole  to  jig  feed    

Ratios  for  free  settling 

hindered  settling 

sieve  scale •  •  •  • 

free  settling  of  quartz  and  galena 


469 


1186 
1099 
1188 

697 
1609 
1715 
1494 
1468 
1507 
1078 
1185 

110 
1115 

173 

1099 

1178 

502 

492 

670 

1177 

487 

367 

446 

487 

491 

849 

865 

1160 

492 

1419 

1923 

2041 

2013 

1185 

1121 

1410 

1174 

57 

57 

1174 

223 

640 

476 

109 

594 

385 

173 

606 

354 

1266 

1278 

2012 

1278 
293 
375 

1460 

205 
1146 
1430 

617 
1428 
1427 


763 
1226 
1218 
573 
471 
625 
367 
1426 


79 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Ratios  free  to  hindered  settling,  application  to  classi- 
fier design 1432 

interstitial,  for  jigs 627,  630,  631 

of  settling,  definition  of 4 

weights  of  stamps  and  mortars 164 

table  of  free  settling    1426 

Rauft,  T.,  gravity  stamps    225 

Huntington  mill 297 

Ray  Copper  Company,  the  mines  of  the.   A.  Hill  . . .   2036 

Raymond  automatic  pulverizer 236 

George    P.,    separation    by    decrepitation    and 

screening 

roller  mill   2014, 

R.  W 

amalgamating  pans 

Balch's  magnetic  separator 

breakers    

Crocker's  stamps 

double-cone  classifier    .... 


gravity  stamps 
plal 


1565 
2017 
884 
291 
834 
57 
229 
426 
223 
57 
230 


jaw 
mortars 

sampling  in  testing  mills    1175 

weathering  at  Meronitz,  Bohemia    839 

Reaction  wheel  for  sampling 848 

Read,  Thomas  T.,  absorption  of  mercury  by  amalga- 
mating plates  1515 

amalgamation  of  gold  ores 1520 

effect  of  temperature  on  amalgamation 1516 

Realgar,  specific  gravity  of 1189 

Reardon,  Ph.,  Colorado  gold  stamp  mills 1184 

construction  of  jigs 643 

Receipts   1123 

Receiving  cone  for  trommels 358 

floors 842 

Recovery  of  brass  from  chips 2025 

gold  from  ashes    177,  702 

from  waste 482 

gold  in  different  parts  of  mill 749 

metals  from  skimmings    2025 

in  refuse   2025 

waste  in  stamp  mill 266 

Rectangluar  buddle 706 

Red  Metal  Mining  Company    1836 

River,  Cornwall,  tin  washing 1182 

tin  works 1082 

Reducing  roast  for  magnetism    1995 

Reduction,  amount  of,  in  rolls    92 

of  iron  ore  to  magnetic  oxide 813 

ratio  of,  for  gyratory  breakers 1218 

with  rolls,  diagram  of  percentage    1227 

Reed  dry  placer  machine 838 

S.  A.,  sampling   884 

Reese  River  process  of  amalgamation 248,  1039,  1173 

Refining  at  Mill  117 1674 

cost  at  Mill  106 1643 

plant  of  Mill  106     1643 

Reflectoscope  for  measuring  mineral  grains 1996 

Re-grinding  machines 2014 

M.  Schwerin 1340 

relative  efficiency  of 1331 

Regularity  in  feeding 1114 

Regular  mill  testing 1168 

Regulation  of  height  of  discharge  in  stamps 212 

temperature  in  Wilfley  roasting  furnace  with 

pyrometer    1548 

Regulators  for  water 858 

Reichenecker,  A.,  amalgam 788 

dressing  gold  ores  in  Colorado 1177 

gravity  stamps     224,    229 

Reifsnyder,  Shimer  and,  sampling 884 

Reinforced  concrete  bins  at  Mill  160 1834 

Relation  of  angle  of  nip  of  rolls  to  feed  and  space  92 

rolls  to  angle  of  nip 94 

speed  of  current  to  size  of  grain  in  settling 

tanks 452 

surface  to  diameter  of  ore  particle 305 

weight  to  surface  of  crushed  product 310 

Relative  proportion  of  gold  and  silver  in  daily  amal- 
gam as  compared  with  hard  amalgam 762 

on  successive  plates 763 

Reliance  rolls   82,111 

at  mills    1750,  1751,  1752,   1822,  1825 

self -tightening  cam 229 

Reluctance  in  magnetic  field 792 

Remedies  for  sickening  of  mercury 751 

Remedies  district,  Colombia,  mill  in 1182 

Removal  of  amalgam  from  plates 757 

coarse  concentrates  in  jigs 576 

concentrates  on  jigs 586 


Removal  of  jig  tailings  ...........................  587 

products  of  slime  tables  ....................  689 

stains  on  plates  ..........................  751 

sticks,  bolts,  pick  points,  etc  ................  882 

wood  at  Mill  164  .........................  1607 

from  ore  previous  to  crushing  at  Mill  164.  .  1849 
Repairs.     See  also  each  machine. 

cost  of  for  breakers  .........................  50 

in  vanners  .............................  663 

in  mills,  cost  of  .............................  1129 

on  Blake  breakers  ..........................  24 

jigs    ....................................  604 

rolls,  cost  of  ...............................    104 

Wetherill  magnetic  separators,  cost  of  ........  1525 

Reports    ......................................  1122 

Republic  gold  mine  .....  .  .......................  1  176 

Repumping  water  ..............................  1  104 

Reserve  capacity  in  mills  ......................  .  .  1109 

Reservoirs,  clarifying    ...........................  460 

for  water.     See  Individual  Mills  in  Chapter  XX. 

Resetting  tappets    ..............................  201 

Residue  after  retorting  ..........................  783 

Residuum  oil  for  separation  ......................  831 

for  oil  testing  ..............................  1  155 

Resin  for  belts   .................................  1094 

smoking  moulds  ..........................  784 

Respirators    ...................................  1  100 

Results  at  Mill  187  .............................  1920 

of  classifying  limonite  ore  ...................  405 

film-sizing  tests    ..........................  719 

free-settling  tests  .........................  466 

the  tubular  classifier  tests    .................  613 

Von  Reytt's  power  and  surface  measurements.  306 

Retorting  amalgam  .............................  781 

loss  in  ....................................  783 

Retorts   .......................................  1519 

for  amalgam    ..............................  781 

sealing  of    .................................  1519 

Re-treatment  plant  (proposed)  at  Mill  152  ..........  1814 

Revenue  tunnel  mill   ............................  931 

Mines  Co.,  mill         ....................  xxvi,  928 

Reverberatory  furnaces  for  roasting  ...............  814 

for  porosity    .........................  829 

previous  to  magnetic  separation  ........  1544 

Revere  Rubber  Company,  conveyor  belt  at  mills.  .  .  .  1706, 

1709,  1819 
"  Silverton  Brand,"  elevator  belting  at  Mill 

126    ..............................  1707 

Revolutions.     See  speed. 

and  periphery  speed  of  rolls  ..................  87 

of  rolls    ...    ..    .  ...........................  88 

slime  tables    .............................  696 

steam  stamps  ............................  128 

trommels    ...............................  349 

Revolver  for  bottle  tests  .........................  1157 

Revolving  circular  concave  slime  tables  ............  692 

convex  slime  tables   .......................  686 

convex  slime  table,  Clark  table     ............  689 

devices  used  on  ......................  689 

Evans  table    .........................  689 

Schranz  table     .......................  689 

picking  table    ............................  490 

cylindrical  furnace  (Oxland)  at  Mill  137  .......  1741 

distributor    ................................  1418 

driers    ....................................  880 

at  mills  ............................  1746  1762 


346 


328 
334 
1353 
1353 


80 


knife  buddle 

Ball's 
screens 

classification  of 

cones,  pyramids,  prisms    ..................  361 

Gates  all-iron  frame   ......................  1353 

King  screen   .............................  1356 

octagonal    ...............................  1353 

revolving   grizzly   of  the  Denver  Engineering 

Works  Company     ......................  1353 

sectional   ................................  1353 

submerged  trommel    ......................  1355 

strakes    ...................................  725 

Rexroth  coal  jig    ...............................  641 

Reynolds  boilers    ...............................  997 

Corliss  engine    .............................  1003 

Edwin  ....................................  viii 

mill,  fineness  of  amalgam    ...................  764 

Oscar,  sealing  amalgam  retorts    ..............  1519 

Reytt,  K.  von    ..........................  60,  110,  1185 

apparatus  for  classifying    ..................  477 

crushing  machines  at  Przibram  .............   316 

gravity  stamps  ....  .......................  229 

jaw  breaker   .............................  60 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Reytt,  K.  von,  Karlik  gyrating  screen    386 

screen  and  jig  at  Przibram   1185 

Linkenbach  tables 729 

mill  machines 1 177 

moisture  in  drained  ore 1185 

rolls  versus  other  crushing  machines 112 

Schranz  mill 296 

Rheinpreussen  colliery,  air  blast  at 837,  838 

Hochstedt  apparatus  at 816 

Rhenish  provinces,  mills  in 1176 

Prussia,  picking  in    481 

Rhodesia,  S.  Africa,  milling  practice  at.     F.  C.  Rob- 
erts      2044 

Rhodium,  atomic  weight  of 1188 

Rhodochrosite,  specific  gravity  of    1189 

Rhodonite,  specific  gravity  of 1189 

Rhyolite,  weight  of 1190 

Ribbon  theory  of  roll  capacity  101 

Ribtet  aerial  tramway  at  Mill  124 1696 

Rice,  C.  T.,  Kinkead  mill  at  Goldfield,  Nevada  ....  2038 

milling  at  Virginia  City,  Nevada    2038 

Richards  annular  vortex  classifier   .406,  1382 

at  mills-  - . .  1692,  1693,  1694,  1710,  1711,  1712,  1743, 

1751,  1752,  1753,  1755,  1774,  1775,  1776,  1778, 

1816,  1867 

classifiers  at  mills. 1829,  1885,  1886 

Coggin  hydraulic  classifier 391,  1367 

at  mills 1878,  1879,  1896,  1898 

details  of  in  mills 393 

J..  centrifugal  pumps 884 

jig  discharge 580 

stamps  versus  other  crushers 229 

pocket  vortex  classifier 1373 

pulsator  classifier 1388,  1419 

direct  form 1391 

fourteen -day  test  at  Mill  162   1391 

nine-day  test  at  Mill  162   1394 

table  of  sizes,  capacities  etc.,  of    1390 

iig.. 1453,  1459 

depth  of  bed    1456 

operation  of 1455 

size  of  feed  for 1456 

table  of  sizes,  capacities  and  dimensions  . .    1455 

test  on 1456 

Rapid  Economy  stamp 2012 

R.  H.  and  Locke,  C.  E.,  dressing  of  tin  ores   . .    1924 
tests  on  a  surface  current  box  classifier   .     477 
A.   E.   Woodward,   curves  for  free-settling 

particles  from  Rittinger's  formula 476 

concentration  of  black  sands 2047 

edge  runners    295 

experiments  to  determine  laws  of  jigging 640 

glass  classifier  and  slime  table   1 176 

gravity  stamps 223 

Richards-Coggin  classifier 476 

school  laboratory  work  a  free  milling  gold  ore  .   2048 

sieves,  classifiers,  and  jigs  1175 

silver  amalgam    787 

slime  tables    728 

spitzlutte •. 476 

study  of  the  Wilfley  table   1511 

on  different  feeds    2022 

testing  a  jig 1176 

for  a  mill  process    1183 

jig 1174 

typical  methods  of  milling  in  Missouri 2040 

undercurrent  for  saving  black  sands 1419,  2020 

velocity  of  galena  and  quartz  falling  in  water  1433. 

2020 

particles  falling  in  water   476 

shallow  pocket  classifier 401 

hindered -settling  classifier 1384 

hydraulic  classifier,  estimated  capacities  of 
with  different  sizes  of  sorting  columns    .  .     405 

sizing  test  of  products  of 406 

Shepard  spitzkasten 1401,  1419 

tests  of  power  required  in  crushing  by  rolls 311 

tubular  classifier   428 

undercurrent    1386 

Richardson  automatic  weighing  scales 1872 

at  Mill  132 1727 

C.  S 1276 

order  of  drop  of  stamps 1278 

Rich  ore  picked  out  for  economy 481 

treated  separately   1111 

Rickard,  T.  A.,  across  the  San  Juan  mountains 1923 

adaptation  of  gold  stamp  mills 1181 

amalgamated  plates 735,  737,  745,  747,  750, 

762,  768,  787 
amalgamating  pans 290 


Rickard,  T.  A.,  amalgamation    787 

at  Ballarat,  Australia 788 

dunes,  Australia 788 

Hidden  Treasure  mill,  Colorado     788 

Premier  mill,  Otago,  New  Zealand    . .    . .  788 

in  the  Thames  district,  New  Zealand    . .    . .  788 

breakers    55 

canvas  and  blanket  tables;  vanners  and  bump- 
ing tables    728 

Colorado  system  versus  California  system  .  .227,  1175 

copper  mills  of  Lake  Superior    1419 

Gilpin    County,     Colorado,     and     California 

methods  of  gold  stamp  milling   1181 

gold  milling  in  Australia 1180 

stamp  mills  at  Bendigo,  Australia    1180 

Clunes,  Victoria   1180 

Grass  Valley,  California     1180 

Otago,  New  Zealand 1180 

Thames,  New  Zealand   1180 

in  Amador  County,  California 1180 

Gilpin  County,  Colorado   1180 

the  Black  Hills,  South  Dakota   1181 

the  Ovens  district,  Victoria    1180 

gravity  stamps 223,  224,  226,  228 

mill  of    the  Guanajuata   Reduction  &  Mines 

Company,  Mexico  2045 

milling  in  Lake  Superior    1997 

mills  at  Bendigo,  Australia    788 

mortars     164,  165 

narrow  sluice  plates    788 

order  of  drop  of  stamps    215 

plates  and  traps  in  the  Black  Hills    788 

and  at  Grass  Valley    787 

at  Grass  Valley,  California 788 

in  Amador  County  mills,  California 788 

the  Ovens  district,  Victoria    788 

pneumatic  concentration    837 

removal  of  sulphurets  from  mercury      770 

rock  breakers    56 

shoes  and  dies      181,  183 

size  of  plates    788 

sluice  plates  740 

stamp  milling 1030,  1174 

of  gold  ores xx 

in  United    States,  Australia,  and  New 

Zealand 227 

mills  at  Ballarat,  Victoria 226 

Clunes,  Victoria    226 

Otago,  New  Zealand     226 

Thames,  New  Zealand      226 

in  the  Black  Hills  ....  .227 

and  at  Grass  Valley  1176 

Gilpin  County,  Colorado    226 

stamps  for  different  purposes   227 

steam  stamps  for  gold  in  Black  Hills   142 

water  used  in  stamp  mills 222 

1875 

1927 

341,384 

.  1346 


Ricketts,  L.  D. 

power  tests  by  

Riddles 

and  vibrating  grizzlies 

comparison  of    

versus  trommels    365 

Ries,  Heinrich,  basin  washers  and  wash  trommels    . .     335 

washing  clays 1183,  1186 

Riffle  bars  on  revolving  strakes 725 

blocks    721 

boxes,  with  mercury   724 

cleats,  arrangement  in  Deister  concentrators  . . .   1488, 

1489 

cast-rubber  for  1487 

copper  I486 

for    1481 

Deister  concentrators 1488 

for  New  Standard  concentrator 1479 

Wilfley  tables 1467 

height  of 1468 

material  for    1467 

"tacking  on"  versus  "grooving"  1498 

grooves  of  Card  concentrator,  shape  of 1483 

tables    670,  1120 

mills 1004 

on  dredges 1007,  1008,  1012 

Riffles •. 720,  1507 

application  of 723 

bar 721 

bibliography  for 727 

Caribou  riffle  1509 

cocoa  matting,  expanded  metal  and  iron  mesh  in 

dredges 1653 

containing  mercury 768,  770 


81 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Riffles  containing  mercury,  advantages   and   disad- 
vantages    771 

depth  of  bed    1511 

expanded  metal 722 

for  gold  dredging    703 

mercury  traps 772 

sampling    844,  1570 

forms  of   721 

used  in  sluices  723 

Grass  Valley    770 

Rowland 722 

Hungarian    725 

La  Point  suspended  riffles 1509 

on  dredges 1012 

tables 675-679 

advantages  of 679 

Wilfley  table 672 

plain  transverse 722 

principle  of 644 

revolving  strakes  725 

Robinson    721 

rock 721 

sluice  1464 

timber  riffle  blocks 721 

undercurrents 726 

use  upon  slimers  1498 

Rigid  rolls 112,  2010 

at  mills 1237,  1865,  1893,  1901,  1906 

Denver  Engineering  Works  Company,  descrip- 
tion of 1235 

Right  and  left  hand  cams  195 

Ring  and  cone  for  sampling  844 

for  amalgamating  pan   244 

stamp  cams    192 

head 185 

steam  stamps 120 

Rings,  details  of,  from  mills 122 

Rinsing  cylinder    335 

table  for  hand  picking 488 

Risdon  Iron  Works viii.1859 

amalgamating  pan  . .  .243,  244,  245,  246,  247,  249 

Blake  breaker    22 

Bryan  mills  at  Mill  173 1928 

clean-up  pan 251 

crack-proof  vanner  belt 1503 

dredge 1653 

open-connected  type 1654 

vanner 651,  652 

weight  of  spider  and  driving  cone  made  by.  247 

Rirtinger,  beveled  rolls 71 

capacity  of  jigs   597 

coarsest  size  jigged  605 

concave  buddle   706 

double  trough  classifier    416 

duck  tables 702 

feeding  rolls  71 

figures  on  hand  jig  49 

formula  for  amount  of  throw  of  jigs 595 

free  settling 471,  1421 

hammers  for  breaking  11 

hand  jigs    497,  499 

643 

537 

530 

592 

507 

-. 471 

411,439 

tables  of  sizes  of   440 

power  for  jigs    603 

required  for  crushing 313 

principles  of  ore  dressing 1175 

P.  R.  von 330,  334,  342,  434,  1038,  1059,  1104 

amalgamation    787 

Blake  breaker    56 

breakers,  hammers,  and  roasting  for  friability  56 

buddies,  percussion  tables,  slime  tables  ....  728 

Carr  disintegrator 298 

cone  mill 292 

crushing  machines 316 

details  of  hand  picking 492 

edge  runners    295 

elevators,  sand  wheels,  and  conveyors    ....  884 

fluted  rolls   109 

gravity  stamps 223 

grist  mill  or  buhrstone  mill 291 

Harz  jigs  movable  sieve  jig 639 

Lehrbuch   xx 

magnetic  separators    832 

mathematical  discussion  Cornish  rolls 109 

mill  schemes  ....                                            .  1174 


mechanism 

plunger  clearance  

length  of  jig  sieves  

movable  sieve  power  jig  . . 

parabolic  formula 

pointed  boxes. 


82 


Rittinger,  P.  R.  von,  movable  and  fixed    sieve  jigs, 

setzpumpe 639 

pointed  boxes,  spitzlutt  ,  runs 479 

schleudermiihle 299 

separation  by  centrifugal  force 839 

settlers 787 

setzpumpe  and  Harz  jig 639 

sieve  scale,  screens,  riddles  and  trommels    .  385 

spalling  and  cobbing  hammers 56 

trough  washers    334 

rectangular  buddle    706 

roll  speeds    87 

round  convex  buddle 704 

rule  for  middlings 1086 

runs 448 

separation  by  centrifugal  force  827 

setzrad 478 

sieve  scale    366,  1144 

double 1361 

for  testing  screens 1138 

skimming  sieves 577 

slope  of  jig  sieves   548 

tables 667 

spalling     11 

specific  gravity  test 1159 

sptizkasten 433,  1367 

principle 409 

spitzlutte 422,  424,  477,  773 

stay  battery    229 

and  overflow  battery 214 

stroke  of  jigs   594 

sweeping  table  703 

table    667 

compared  with  Wilfley 679 

theory  of  advantage  of  jig  over  free  settling  ....  625 

crushing   304 

jigs 533 

thickness  of  screen  plate   372 

under-piston  jig 520 

velocity  of  stroke  of  jigs    595 

wash  trommels 329 

width  of  jig  sieves 591 

River  dredging  for  gold 1009 

pebble  phosphate    895 

Roasted  blende  and  pyrite,  jigging  of    640 

Roasting  and  magnetism 900 

arsenopyrite  for  magnetism  at  Mill  185 1916 

for  friability 56,  57,  58,  839 

leaching  * 1168 

magnetism. . . .  790,  799,  800,  813,  1543,  1544,  1611 

at  Mill  148 1793 

bibliography  for 832 

effect  of  carbon  in 1544 

experiments  in  roasting  pyrite    1544 

in  testing 1995 

minerals  which  become  magnetic  on  roast- 
ing    1995 

use  made  of,  in  mills 890 

porosity 828,  839,  890,  1611 

wolframite  in  tin  ores 1081 

furnaces    1545 

at  Friedrichssegen,  Germany    1546 

mills 1663,  1747,  1759,  1765,  1862 

Dings 1548 

Galena 1548 

Howell-White .* 1545 

at  mill  148 1792,  1793 

Mathey,  at  Mill  148 1793 

McDougall  type    1546 

Oxland  furnace  1548 

Trego    1548 

at  Mill  148 , 1792 

Wilfley  furnace   1546 

iron  ore 58 

ore,  effect  on  power  required  for  crushing 313 

practice,  Wisconsin 1548 

silver  ores 1039 

tin  ores 1082 

to  remove  calcium  sulphate 816 

Robbins,  A.  C.,  amalgamation  and  concentration  at 

Dayton,  Nevada    1184 

Robert,  F.  C  ,  Carr  disintegrator 298 

cost  of  constructing  a  20-stamp  mill  2049 

Huet  and  Geyler's  jig 641 

North  Star  stamp  mill  at  Grass  Valley 1182 

Roberts,  slime  table 691 

Robillard  mine  mill 1183 

Robins  belt  conveyor 805,  859,  1585,  1610,  2031,  2033 

at  mills.  1636,  1637,  1661,  1727,  1750,  1805,  1806, 

1807,  1808,  1809,  1810,  1811,  1812,  1813,  1821. 

1822,  1823,  1824,  1825,  1826,  1828,  1876,  1913 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Robins  belt  conveyor  in  Blaisdell  system  1602 

stamp  mills 2031 

picking  belt    1438 

at  the  West  Aurora  mill    2021 

Thomas,  Jr.,  Robins  belt,  rollers,  etc 884 

Robinson  coal  washer  (classiiier) 478 

Deep  Gold  Mining  Co.,  Ltd.,  mill  of 1648 

Diamond  Mining  Co 839 

gold  mine,  mill  at 1184 

jig    504 

mill,  details  of  stamps   221 

riffle 721 

washer  for  coal   447 

Roche-la-Moliere  colliery,  coal  washing  at 2050 

Rochelt,  F.,  automatic  slate  picker  for  coal 493 

Rocheux,  double  discharge  on  jigs  at  584 

Rock  breakers.     See  Breakers,  Jaw  Breakers,  Spin- 
dle Breakers. 

breakers 13 


Roll  shells,  truing  with  emery  wheel 1243 

wear  of 69 

_j 
Rolls 


Gates'  style  "K" 1207 

Hathaway  gyratory 1215 

in  reserve   1 109 

kinds  of 13 

Krupp 1202 

gyratory    1215 

location  of 1109 

McCully  gyratory 1210 

method  of  operating 13 

separate  motor  for    1092 

emery  mill     232,  253 

bibliography  for 291 

horizontal  255 

vertical    255 

house,  picking  in 482 

houses 483,  485,  991,  995,  998,  1000,  1109 

powders,  effect  of  water  on.    A.  S.  Cushman  . .  1419 

riffles  721 

Rocker    723 

Rocking  stone  mill 1084 

table 320,  1032 

Rocky  Mountain  mill xxix,  1048 

Rodda,  J.  T.,  new  form  of  stamp 228 

Roebling 1195 

Roebling's  gauge    1194 

screen  gauge 173 

Rogers,  A.  N 787 

Colorado  versus  California  system  of  milling  .  1174 

data  concerning  slime  tanks   1408 

gravity  stamps 224,  226 

Rogers'  dewatering  screen 1591 

at  Mill  144 1592 

jig    642 

Rohrmiihle 293 

Rolker,  C.  M.,  Allouez  mill,  Lake  Superior    1174 

Ball  stamp 142 

Collom  jig  at  Lake  Superior '640 

concentration  at  Glasdir,  Wales 1183 

cross  pieces  on  jigs 551 

Evans  slime  table  and  kieve 728 

hog-trough  classifier 476 

mill  capacity    1109 

milling  in  Utah 1174 

Rolled  saw  plates  at  Mill  180,  life  of 1902 

steel  for  wearing  parts  of  rolls 1243 

Roller  feeder 854 

mills 1303 

Griffin 282 

Huntington  centrifugal 276 

Kent  mill    1303 

number  used    231 

table  of  details  of  Kent  mill     1304 

Wild  mill    1304 

table  of  sizes,  capacities,  power,  weight, 

etc 1304 

quartz  mills,  Bryan 271 

shells  for  Huntington  mill 280 

Rollers  for  belt  conveyors 859 

on  vanners 646 

Roll  jaw  breaker,  Sturtevant    32 

Blake  breakers,  Sturtevant   1205 

crushing.    R.  K.  Humphrey 2010 

L.  H.  Sturtevant 2010 

shells  66 

at  Mill  129 1716 

cost  of 69 

flanges  on  70 

materials  for 68 

of  chilled  steel  2011 

truing  of 69 

device,  Sturtevant 1243 


s    

'  62 

action  of  on  ores  

62 

Allis-Chalmers  .  . 

1244 

82 

an  article  on  

2010 

angle  of  nip  for  ...    . 

89  109  110  1226 

Argall  rolls  .  . 

.    1230 

as  regrinding  machine 1332,  1333 

at  mills 1244,  1667,  1685,  1686,  1688,  1689,  1690, 

1691,  1693,  1701,  1707,  1710,  1716,  1720,  1724,  1737, 

1738,  1742,  1743,  1749,  1750,  1751,  1752,  1760,  1761, 

1762,  1766,  1767,  1771,  1772,  1773,  1792,  1793,  1803, 

1806,  1807,  1808,  1819,  1822,  1824,  1825,  1828,  1829, 

1832,  1833,  1837,  1838,  1843,  1844,  1853,  1854,  1857, 

1859,  1864,  1865,  1866,  1867,  1868,  1869,  1877,  1878* 

1883,  1890,  1910,  1913,  1928,  1929,  1930 

auxiliary  spring 80 

babbitting 73 

Becket  Foundry  &  Machine  Co 76 

belted    75 

and  geared 79 

beveled    71 

bibliography  for 109 

Birmingham  Iron  Foundry 76 

Bowers    Ill 

boxes  or  bearings  for 72 

Buchanan  72 

capacity  of 64,  100,  106,  1226,  2010 

speed,  power,  wear,  etc.  . .' 109 

Chicago  Iron  Works 76 

choke  and  free  crushing  by 98 

classification  of    62 

coarse  and  fine.     C.  Blomeke 2010 

Colorado  Iron  Works 76 

compared  with  stamps 109 

Sturtevant  mills 110 

comparison  between  free  and  choke  fed  rolls   . .  1229 

convex  and  concave Ill 

core  of 65 

corrugated 106,  110 

rolls  and  rolls  with  inserted  teeth    1242 

table   of    sizes,    capacities,   and 

power 1243 

cost  of  crushing  by 104 

repairs  on .'.  .  104 

Davis Ill 

diagram  of  percentage  reduction  in 122 

diameter  of 83 

different  types  of 2010 

discussion  of 2010 

driving  mechanism 75 

Eagle  Foundry  Co 76 

Eckart Ill 

Edison's   110,  111 

corrugated    

giant    

three  high 

effect  of  ores  on  angle  of  nip 

efficiency  of    

E.  P.  Affls  Co 

features  and  faults  of 

feed  to 

feeders  for 


106 
105 
107 


109 

72,76 

1229 

63,  1224 

71 

feeding  of 70 

fines  produced  by 308 

finger  geared    77,  78 

F.  M.  Davis  Iron  Works  Co 72 

formula  for  angle  of  nip   93 

for  removal  of  vanner  concentrates  647 

vanners 652,  653 

Fort  Scott  Foundry  &  Machine  Co 76,  111 

frames  of    63 

Fraser  &  Chalmers   76 

geared  78 

Fulton  Iron  Works 76 

Gates  Economic 81 

Iron  Works    73,  79 

geared 75 

and  belted  compared     

general  construction 63 

Gever    70,    111 

graded  crushing  by 103 

G.  V.  Cresson  Co 72 

Hendy  &  Meyer 76 

hexagonal  cores 109 

high-speed   88 

sizing  test  of  pulp  from  1317 


83 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Rolls,  high-speed  versus  Bryan  mills 1309 

hoppers  and  housing    83 

horse-power  of 64 

Humboldt  high-speed  rolls    1241 

Humphrey  rolls 1234 

table  of  sizes,  power,  speeds,  weights,  etc.  .   1235 

in  stamp  mill 1017 

journal  friction    95 

J.  W.  Jackson's 72,  76,  111 

kept  true 70 

Krom  belted 82 

Gates,  and  other  makes 109,  110,  111,  112 

Krupp  high  speed     1238 

lever  and  weight 73 

made  by  Power  and  Mining  Machinery  Com- 
pany        1245 

material  for  wearing  parts  of   1243 

materials  cost,  wear,  etc 66 

McFarlane  72  76,  1232 

McLanahan  and  Stone  single-roll  crusher 1241 

method  of  cleaning 2011 

M.  Hoagland  Sons  Co 77 

Milburn's  crusher Ill 

Montana  Iron  Works 76 

Neuerbergs 110 

Odell's Ill 

on  native  copper  ore 990 

periphery  speed  and  revolu  ions 88 

pillow  blocks  and  alignment 71 

for   80 

Pitts  burg  Foundry  &  Machine  Co 76 

power  and  wear 108 

for 95,  106 

pressure  exerted  by  311 

of 108 

on 73 

principle  and  purpose  of 62 

of  roll  crushing     1224 

products  crushed  by 63 

proper  amount  of  reduction    92 

quality  of  crushing  by   98 

ram  for 112 

ratio  of  feed  to  space  90 

reduction 1226 

relation  of  diameter,  feed,  space,  and  angle  of 

nip 92 

speed  to  angle  of  nip 94 

trommel  hole  to  roll  space 95 

Reliance Ill 

ribbon  theory  of  capacity    101 

rigid    112,  1235 

Roger's 74,  110,  111 

running  at  different  speeds   88 

Schellenbach  Sons 76 

Schwarzmann's 109,  110 

scrapers  for    75 

sectional   81 

shaft,  journal  speed,  etc 76 

shafts 65 

shims  for 74 

side  adjustment 71 

size  of  feed 90 

speed,  capacity,  etc 107 

sizes  of    64 

speeds,  etc 72 

treated  by 63 

weights,  and  speeds 79 

sizing  tests  on 99,  315 

test  on  pulp  of  coarse  and  fine    rolls    at    Mill       * 

162 1328,  1329 

spaces  between    64,  89 

special  forms   104 

speed  of    64,86 

rolls  and  speed  curves    1224 

spring  pressures  on 72 

affecting  friction    96 

springs  or  weights  for 73 

S.  R.  Krom's 72,  77 

Sturtevant  balanced  rolls 1232 

table  of  sizes,  power,  weight,  dimensions, 

etc 1234 

centrifugal  rolls  74,  1237 

Superior  crushing  rolls 1231 

table  of  data  from  the  mills    64 

value  of  forces  acting  at  different  angles    94 

tests  on  work  required  for  rolls   306 

Thum's  compound  110 

toothed 1243,  2010 

table  of  sizes,  capacities,  and  power 1243 

Triplex  rolls 1239 


Rolls,  Tuttle  Manufacturing  &  Supply  Co 76 

types  of 75 

Union  Iron  Works     72,  111 

use  of  for  brittle  ores   314 

used  in  brick  manufacture    2011 

velocity  of  approach  in 314 

versus  ball  mills  at  Mill  159  1830 

Chili  mills  for  clays      2010 

disintegrators 298 

gravity  stamps 222 

grinders 110 

Heberli  mill 258 

Huntington  mills 1 10 

stamps    224,  314 

steam  stamps 110 

at  Mill  179 1900 

Sturtevant  mill Ill 

Vezin,  made  by  Colorado  Iron  Works   84 

Walburn-Swenson  Co 76 

Wall's  corrugated  finger  gear Ill 

W.  F.  Mosser  &  Co 76 

width  of   83 

Wilds 72 

with  flanges    110 

fluted  surfaces 109 

knobs 106 

teeth 111,112 

sluggers  and  knobs 104 

without  springs   74 

Rompf  jig  screen.    C.  Blomeke 2021 

Roofs  for  mills 1088 

Root  rotary  pump 982,  989 

W.  A.,  the  Macquisten  flotation  process 2030 

Rope  convevors,  picking  on    489 

drive  for  sand  wheels 866 

tramway 937 

transmission 1094 

Ropes,    L.   S.,    mill  of   Isel   Corundum    Company, 

Georgia     1183 

Resales,  Henry,  auriferous  quartz  in  Victoria 1176 

gravity  stamps 224 

Rose,  T.  K 787 

amalgamating  pans 290 

amalgamators 787 

arrastra 290 

Blake  and  Schranz  breakers,  Dodge  and  Gates 

breakers    56 

clean-up  pan 29 1 

Crawford  mill    295 

Cyclops  mill 294 

gold  from  placer  and  vein  rock   1174 

gravity  stamps 223 

Harz  jigs 639 

Huntington  mills 297 

Husband   pneumatic  and   Patterson  elephant 

spring  stamps      143 

Jordan's  centrifugal  grinder   295 

Krom  jig  and  Clarkson-Stanfield  machine  . . .  837 

rolls •- 109 

large  steam  stamps 142 

lime  for  slime  settling 1419 

metallurgy  of  gold xx 

pointed  boxes 476 

retorts 783 

riddles  versus  trommels 385 

size  of  stamp  feed 207 

Roseberry,  B.  C.,  concentration  at.     A.  W.  Dyer    .  .  2043 

Rosenlecher,  R.,  dressing  quicksilver  in  Tuscany  . .  .  1177 

Roskelly,  I.,  stamp  mill  construction    2048 

Ross.  J.,  Jr.,  Wildman  and  Hector  gold  stamp  mills  1184 

Rossland  district,  B.  C.,  milling  in  the.     R.  Hookes  2046 

Rotary  breaker  at  Mill  186 : 1917 

drier  at  Mill  186 1917 

percussion  table,  Bartsch 1497 

pumps 87 1 

Rotation  of  gravity  stamps 194 

Rothwell,  John  E.,  belt  elevators 884 

rolls  for  chlorination  process Ill 

R.  P.,  Blake  breaker    57 

in  Ontario  mill    57 

Linkenbach  tables 728 

Ontario,    Silver   Reef,  and  California    silver 

mines  in  Nevada 1174 

Rotter,  Max viii 

Rough -crushing  department  at  Mill  152 1805 

Roughing  jig  894 

jigs  at  Mill  148 1792 

plane,  definition  of 1465 

Roughness,  effect  of,  in  launders 877 

Rough,  unplaned  pine  board  surfaces  used  as  plates  750 


84 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Roulette  ball  mill.     C.  Blomeke    2016 

Round  convex  buddies   704,  706 

holes  compared  with  slotted  holes  in  screens  ...      169 

tables,  adjustments  of    2023 

at  mills 1846,  1904,  1905,  1908 

continuous  surface 1506 

Routine  of  managing  heads  and  concaves  on  spindle 

breakers    47 

Rowand  incline  screen     1345 

at  mills 1345,  1762,  1763,  1764,  1805,  1806, 

1808,  1809,  1810,  1811 

magnetic  separator 807 

at  mills 1763,  1808,  1810 

tower  drier  at  Mill  152     1807,   1813 

type  gravity  screen  at  Mill  138    1746 

vertical  drier  at  Mill  141 1765 

Royal  breaker   58 

Con.   Mines  Co.,   California,    the   mill  of   the. 

H.  F.  Brown 2044 

Rubber  belt  conveyors 859 

for  elevators 862 

vanners   647 

belting  in  launders    873 

belts 1094 

tables 698 

cushion  for  steam  stamps. 116,  127 

for  amalgamated  plates 754,  758,  760 

riffle  cleats   1487 

roll  springs 73 

sheet  for  mortar  blocks    148 

surface  for  slime  tables    695 

table  deck  of  Woodbury  table    1495 

•versus  canvas  for  vanner  belts    650 

Rubidium,  atomic  weight  of 1188 

Ruby  coal  breaker,  Colo.,  practice  at  the.    R.  M. 

Hosea    2051 

washing 2025 

Rudorf,  theory  of  flotation  processes    1555,  1556 

Rul,  M.,  arrastra  at  Guanaxuato,  Mexico  290 

edge  runners 295 

Rules  for  belting 1093 

jigging 631 

mechanical  sampler    846 

power  consumed  in  mills 1093 

used  in  crushing   309 

sampling 848,  849,  850 

Running  cost  of  spindle  and  jaw  breakers 54 

jigs,  labor  for 604 

methods  of 551 

sample    843,  845 

stamps   206,  223,  224 

Runs 447,  476,  1082 

Russell  process    1175 

Russia  iron  for  jig  screens 545 

screen  gauge 173,  1195 

Rusty  gold 786,  1014 

catching  of  776 

in  dredging 1012 

Ruthenium,  atomic  weight  of 1188 

Rutile  separated  by  magnets 790 

specific  gravity  of  1189 

Rutter  breaker 45 

Ruttman,  F.  S 1175 

Blake  multiple  jaw  plant 57 

breakers    57 

Conkling  jig 640 

Ryerson  pulverizer   236 

bibliography  for 299 

S 

Sachs,  C.,  Neuhof  mills  at  Beuthen 1186 

Sacks  for  concentrates 1112,  1113 

Safety  devices  for  steam  stamps 127 

Sahlin,  A.,  Alsing  cylinder    294 

breakers    57 

breaking  point  for  jaw  breakers 49 

buhrstone  mill 253 

Conkling,      Buchanan,      Edison,     Wenstrom, 
Ball -Norton,  Hoffman,  Lovett-Finney,  and 

Chase  separators 835 

Cyclone  pulverizer 298 

Griffin  roller  mill 297 

grist  mill  or  buhrstone  mill 291 

Lovett-Finney  separator  at  Weldon,  New  Jer- 
sey    835 

machines  in  Gouverneur  district,  New  York  .  57 

magnetic  concentrates 1180 

roll  speeds    87 

rolls  versus  Sturtevant  mills  for  iron  ore    110 


Sahlin,  A.  Sturtevant  mill     288 

mills  -versus  rolls 298 

sizing  test  on  roll  product   100 

Saint  Andreasburg,  sieve  scale  at 367 

David's  Gold  mine,  New  South  Wales,  milling  at 

the.     L.  H.  L.  Huddart    2046 

Dennis,  Cornwall,  tin  dressing  at 1184 

Eugene  mill,  B.  C.,  milling  at  the.     R.  Stokes  2040 

Goar  on  the  Rhine,  mill  at 1102,  1135 

Johns  River,  Florida,  pumps  on    '    870 

Joseph  Lead  Company  mill   xxvi,  924    1175 

Hoffmann  mill 1796 

Just,  Penzance,  mill  at    1082 

Laurent-le-Minier,  mill  at 1179 

Louis  colliery,  air  blast  at 837 

exposition,  the  concentration  plant  of  the  . . .     2047 

floor  of  the  Anzin  Co.,  air  blast  at    817 

Smelting  and  Refining  Company 1709 


85 


Symphorien,  Belgium,  phosphate  plant  at 899 

Sala,  stroke  of  jigs  at 594 

Salamander  crucibles  for  melting 784 

Sal  ammoniac  used  on  amalgamated  plates 749 

Salberget,  concentration  plant  at.     G.  Fagerberg  . .  .  2040 

Salivation  by  mercury    730 

Salkinson,  A.,  use  of  steam  for  settling  slimes    2020 

Salt  used  in  plate  amalgamaton    752 

settling  test 1 147 

water 1106 

effect  of  in  concentration 3 

Salts,  effect  on  amalgamation 767 

Salzburg  tables 682,  1115,  1185 

versus  jigs 641 

Samarium,  atomic  weight  of 1188 

Sample,  dipper  or  bucket    845 

grab '.  845 

grinders 232,  257,  292,  1284 

bibliography  for " .  292 

F.  W.  Braun  Company 1284,  1323 

Nevada     1284 

Sturtevant 1284 

Samplers    843,  1570 

are  inaccurate,  pipe  and  single  split   2032 

at  mills 1691,  1750,  1868,  1873,  1874 

Keewatin,  Ontario.     F.  T.  Snyder    2031 

Smuggler    Union   mill,    an   automatic.     S.  I. 

Hallett 2032 

Bridgman   884 

Brunton 847,  1527 

oscillating  mechanical 1575 

Byrne  automatic  pulp    2031 

cheese-scoop 844 

Clarkson 884 

Collom    847 

different  types    2032 

essentials  of 846 

for  tailings  at  Mill  160 1834 

hand  sampling 1570 

inaccuracies  of  the  old  Brunton 2032 

in  the  mills 848 

Johnson    2031 

Lamb  automatic  tailings  sampler 1573 

mechanical 1571 

pipe  845 

Snyder   846,  1572 

Taylor  and  Brunton  horizontal  riffle  sampler . . .  1577 

riffle 1578 

Vezin    846,  1572 

weaknesses  of  the  Bridgman 2032 

Samples  moisture 846 

storing  samples   1578 

weight  of  samples  taken  in  mechanical  sampling. .  1575, 

1576 

Sampling 843 

a  jig  bed 1171 

and  analyzing  of  slimes.     L.  Ehrmann    2032 

at  mills 1730,  1734,  1912 

Park  City,  Utah    2032 

bibliography  for 884 

bucking  the  sample 1578 

by  coning  and  quartering 1577 

fractional  selection    1570 

hand 844,  1570 

Jones  sampler   1570 

machines,  principles  of 1574 

mechanical  means 1570 

riffles  1570 

shovel    1570 

split-shovel  1570 

cabinet  used  at  the  Sweeny  mill 1570 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Sampling,  cleaning  mill  between  lots    1577 

cutting  down  crushed  ore  from  sample  rolls 1577 

ground  pulp 1578 

department  at  mills 1667,  1691,  1742,  1884 

difficulties  attending  mechanical 1575 

general  article  on    2033 

high-grade  telluride  gold  ores  with  Vezin  sam- 
pler    1573 

in  Colorado    1244 

limit  of  error  in 1575 

mechanical  sampling    1577 

mechanical  846 

methods  at  Broken  Hill.    H.  W.  Moss 2031 

mill 1051,  1069 

S.  H.  Pearce    2032 

minimizing  effect  of  air  currents    1576 

moisture  samples 1575 

notes  on 2032 

of  bullion    784 

concentrating  and  slime  tables,     j .  C.  Bailor    2032 

mill  work    1168 

ores.     P.  Argall 1609 

plant  of  mills    1629,  1831,  1872 

precautions  in    845 

principles  of 849 

requisites  to  accuracy 1575 

rules  for    848 

S,  H.  Pearce    2031 

size  of  samples 1575,  1576 

tower  at  Mill  120   1681 

trough  for  slime  table 1172 

Sampson  mine,  sieve  scale  at 367 

Samson  breakers 1202,  1223 

at  Dives-Pelican  mine    1203 

Mill  113  1659 

Manufacturing  Company.    Samson  breaker 1223 

San  Antonio  de  Yguana  mill    1180 

Sanborn,  J'.  A.,  amalgam    767 

temperature  of  water  for  amalgamation 789 

Sand  and  slime  concentrators 644 

concentrators 1464 

1465 
1078 
1602 
873 
180 
759 
1609 
2031 


Wilfley  table 

corundum 

distributor,  Blaisdell  centrifugal  .... 

flow  of,  in  launders 

for  bedding  false  bottoms  in  mortar 

heated  for  sweating  plates 

in  launders,  flow  of.     F.  K.  Blue    

movement  of  coarse.    T.  T.  Read 


Sandpaper  used  in  scouring  copper  plates 753 

Sand,  preparation  of  moulding.     J.  Kraus 2030 

pumps    868,  1587 

at  Mill  182 1910,  1911 

Standard  Consolidated  mine 1588 

Frenier 871 

and  Le  Blanc 2031 

ratio  to  water  in  pumping 869 

Sands  in  classifiers  and  jigs,  action  of.     G.  G.  Bring  2020 

mechanical  settling  and  filtering  of 2021 

moisture  in 1 107 

transported  by  water    878 

treatment  at  Mill  117 1670 

used  for  scouring  copper  plates 753 

washing  in  New  Jersey,  glass 2029 

weight  of 1190 

wheels 864,    1586 

at  mills. . .    1587,  1668,  1669,  1677,  1715,  1893,  1894 

Calumet  and  Hecla 2032 

details  of 866 

in  the  Transvaal  2031 

mechanical  efficiency  of 1587 

on  the  Rand 1644 

versus  pumps  in  Witwatersrand 1645 

Wilfley  middlings  elevator 1468 

San  Dimas,  arrastras  at 238,  290 

Sandstone,  angle  of  nip  required  to  crush 94 

compressive  strength  of 300 

weight  of 1190 

Sandycroft  standard  cams 215 

San  Francisco,  cost  of  mill  at 1126 

Juan  District,  Colorado,  cost  of  producing  gold 

in  1978,  1979,  1980 

wage-scale    1980 

at  Mill  100 1626 

Martin  mill,  Chihuahua,  Mexico.    K.Thomas.  2046 

Sanna  modified  Ferraris  screen 343 

Santa  Barbara,  oil-concentration  plant,   Van  Meter 

process  at  1993 

Eduwiges  mill   1184 

Sapphire,  North  Carolina,  corundum  dressing  at 1184 


Sapphire  washing   1081 

Sardinia,  ore  dressing  in.     N.  Pellati 2035 

Satelin,  J .  de,  Hughes  Daviot  electromagnet 834 

Saucon  mine,  movable  sieve  jig  at 506 

Sauer- Mayer  riddle 342 

Sautter  magnetic  separator   798 

Sauvage,  E.,  Plumb  jig 641 

Saving  by  canvas  plant   1017 

new  scheme  in  Mill  66    1026 

from  scrap 1 1 15 

in  mills 1114 

gold  mills   1110 

use  of  electricity    1091 

of  water    1104 

Savings,  average  extractions  in  various  districts,  table 

of 1612 

Saw  blade  for  scraping  plates 759 

Sawyer  canvas  elevator  belt  at  Mill  125 1700 

Saxon  mill,  mercury  traps  in    774 

wells  in  770 

shoes  and  dies   181 

Saxony,  cobbing  in 480 

mills  in 1176 

Scaife  trough  washer 320,  335 

Scales  for  weighing  ore    883 

sieve 1361 

in  American  mills,  table  of 1361 . 

weighing  devices 1603 

Scandium,  atomic  weight  of 1188 

Schaefer,  J.  V.,  coal  washing   at  Alexandria  Coal 

Company's  plant,  Greensburg,  Pennsylvania 1178 

Schamberger,  J.  W.,  clay  washing 1186 

Schedules  for  calculating  the  value  of  zinc  ores   ....  1932 

Joplin  zinc  ores 1939 

western  zinc  ores 1933 

zinc  ores,  foreign 1933 

Scheelite,  specific  gravity  of    1189 

Schellenbach  Sons 76 

rolls  76 

Schemes  of  mill  treatment 892,  1613 

Schemnitz,  Hungary,  settling  tests  at 1 146 

U-shaped  classifier 424 

Schiff,  F.,  magnetic  separators 835 

Schleudermiihle 236 

bibliography  for 299 

Schleuderseparator,   description  of  the.    L.  Kleritz 

and  O.  Bilharz 2025 

Schmidlieing  Chili  mill    2017 

Schmidt,  F.,  belt  tables  728 

-Manderbach,  Adolph,  spiral  sieves 385 

spiral  screen    363,  364,  385 

Schnabel,  Carl,  bag  rooms  for  zinc  white 885 

Handbuch xx 

Huntington  mill  282,  297 

separation  processes 839 

silver  amalgamation 1039 

by  Washoe  and  Reese  River  processes  . .  1174 

Scholl,  G.  P.,  modern  gold  milling 2035 

Schone  tubular  classifier   476 

School   laboratory  work,   a   free   milling   gold   ore. 

R.  H.  Richards  and  E.  E.  Bugbee 2048 

Schorr  battery,  R.  Schorr  on  the  1278 

stay-overflow  mortar 1266 

Schranz  breaker 56,  57,  60,  61 

of  Dodge  type 31 

section  of    32 

jig    503,    641 

mill 235,  274,  292 

bibliography  for 296 

products  of,  crushing  Przibram  ore 309 

tests  on  work  required  for 306 

table 689,  728 

Schubersatz    214 

Schulenburg,  hand  picking  at 492 

picking  at  487 

sieve  scale  at  367 

Schulz.  Dr.  and  Herr  Zeuner,  settling  tanks  at  Tar- 

nowitz 479 

W.,  Huntington  mill 297 

Schiirmann,  W.  R.,  rolls Ill 

Schuttelherd,  New  Humboldt  concentrator  1493 

Schwarzmann's  rolls    109,  110 

Schwerin,  Martin,  re-grinding  machines 1340 

relative  efficiency  of  re-grinding  machines 1331 

Scobey,  J.  C..  economy  in  mill  water 1419 

sampler  at  Mill  173   1880 

system  of  slime  settling  in  Arizona   1411 

Scoops  for  sampler  846 

Scouring  copper  plate 752 

Scow  for  dredging    1007,  1011 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Scrap  iron  recovered  by  magnets  .................     790 

use  of      ...................................   1  1  15 

Scraper  conveyors  at  Mill  114    ...................    1662 

Mill  126  ...............................    1709 

for  belt  conveyors  ..........................     860 

hard  amalgam  on  plates  .................  757,  758 

plates  ...................................     762 

rolls  ....................................       75 

slime  tables  ............................  689,  696 

Scraping  conveyors  .............................     860 

Screen  analysis  of  Garfield  Chili  mill  product  ......    1307 

and  lamp  chimney  for  sampling  jig  bed  .......    1171 

area  on  stamps    ............................     209 

for  dredges  ................................    1012 

unwatering  ..............................     724 

frames  ...........................  '.  ........     176 

for  jig   ..................................     510 

steam    tamps  ..........................      120 

in  gravity  stamps  .........................      176 

gauges  ..................................  171,  172 

meshes,  tables  of    ..........................    1196 

of  hand  jig  ................................     894 

openings  ...................................      167 

measurements  of  .........................    1362 

plate,  cost  of    ..............................     361 

sizing   limit  of  .............................    1361 

principles  of  ......................  365,  366,  1361 

Screening  after  decrepitation  ......................     829 

at  the  Witkowitz  colliery  ....................   2050 

by  trommels  system  of  ......................     364 

cost  of  ....................................     360 

difficu  ties  of    ..............................     372 

economic  limit  of.     P.  Argall  ................    1366 

following  disintegration    .....................     830 

hot  and  cold  ore  ...............  .  ............     385 

separation  by  crushing  and  screening  .........    1566 

decrepitation  and    ......................    1565 

tests  ......................................   1138 

graphic  records  of.    C.  De  Kalb    ..........    1340 

wet  .....................................   1138 

trommel    ..................................     335 

wet  versus  dry  .............................    1  139 

Screens    .......................................     336 

See  Trommels  and  Sieves. 

action  of  ..................................   2019 

aluminum  bronze  cloth  ......................     174 

plate    ..................................     174 


analysis 

arrangement  of  holes 

at  Mill  158  . 

Monteponi,  hand 

Truesdale  coal  washery,  shaking 

the  Waihi  mill,  New  Zealand,  size  of 

attachment  of  in  trommels 

balancing  of  shaking 

bar 


2019 
168 
1824 
2018 
2018 
2019 
355 
342 
336 


belt  type  ..................................  1357 

bibliography  for  ............................  384 

blinding  of  .................................  175 

Borgmann  &  Emde  ........................  386 

brass  cloth   ...........  .....................  174 

Briart  bar  .................................  346 

Callow  belt  screen  ..........................  1358 

canvas  shield  for  ........  ...................  177 

capacity  of  .................................  341 

Centripact  .................................  1360 

choice  of  ................................  174,  371 

classified  ..................................  336 

cloth    .....................................  170 

coal.    F.  W.  Parsons  .......................  2019 

Columbian  pulsating    .......................  343 

comparison  of  .............................  345 

shaking  and  cylindrical   .................  2019 

copper  plate  ........................  .  ......  174 

corrosion  of    ...............................  354 

cost  of  per  ton  of  ore  crushed    ...............  174 

Denver  Engineering  Works  Company  revolving 

grizzly  ................................  1353 

designation  of  holes    ........................  172 

dewatering  ................................  1591 

different  types  of  ............................  2018 

Distl-Susky  screw  grate  ......................  386 

Dunlap  perfect  clay  screen  ...................  1357 

Edison  stationary   ..........................  341 

effect  of  acid  water  .........................  173 

size  of  holes  in  stamping  ................  210 

elongated  punched  holes   ....................  370 

Ferraris  hand  ..............................  1360 

shaking    .............................  342,  1347 

for  box  classifiers  .........................  433,  443 


87 


Screens  for  gravity  stamps  1270 

Hancock  jigs,  wear  and  tear  of   1441 

Huntington  mills 281,  1315 

at  Mill  162 1845 

jigs   496,  510,  552 

cost  of     547 

removing  sticks,  bolts,  pick  points,  etc 882 

settling  tanks  458 

stamps,  size  of 221 

table  of  details  of   121 

steam  stamps 119 

material,  size,  life,  etc 121 

testing 1137 

Tremain  stamp 136 

trommels,  life,  cost,  etc 352,  354 

unwatering 879 

jig  tailings    587 

Gates  all-iron  frame  revolving 1353 

gravel 339 

grizzlies 336 

gyrating 342 

Harrington  &  King's  standard  plate 369,  370 

Hicks  revolving  grizzly 385 

Impact  screen 1351 

Imperial  screen 1348 

in  gravity  stamps    167 

size  of  holes  in 210 

mills,  use  made  of 889 

iron  cloth   173 

plate    173 

jig,  details  of 540 

Karop 386 

King  screen 1356,  1360 

Klein  moving  grizzly    386 

life  on  jigs    546 

limits  of    368 

Linkenbach's  figures  on 547 

material,  cost,  life,  etc 173,  174 

for   354,384 

jig 545 

means  of  designation.     P.  Argall 1366 

meshes  of 172 

mill 1365 

amount  of  screening  surface  for  given  output     1365 

cost  of  maintenance  of 1365 

needle  gauge    172 

proper  peripheral  speed  for 1365 

Newaygo  separator 1350 

numbers   172 

Oberegger  gyrating 386 

octagonal  trommels 1353 

of  corrugated  type 226 

gun-metal  at  Mill  185    1915 

plate  or  wire  clcth    340 

on  a  fixed  shaft,  rotary    2018 

opening  in  mortars   167 

percentage  of  opening  in  369,  546 

with  hole  in  60-  and  90°  rows    168 

phosphor  bronze  cloth 174 

plate    174 

placing  of 170 

plate,  for  gravity  stamps 167 

Pratt  ore  sizer 1345 

prevention  of  blinding  373 

pulsating 342 

relation  of  thickness  of  plates  and  wires  to  diam- 
eter of  holes,  in  the  mills 372 

to  diameter    of    holes    in    punched 

screens  as  quoted    372 

revolving    346,  1353 

riddles,  and  vibrating  grizzlies ( 

round  and  square  holes  369 

•versus  slotted  holes 169 

Rowand  incline  screen 1345 

Schmidt  spiral 363 

sectional  trommels    1353 

shaking  342 

shape  and  arrangement  of  holes « 

sieve  scale  for    366 

sizes  of  needles  for 172 

sizing 336,  1345 

slope  of 176 

speed  of  shaking 342,  345 

splash  board 177 

standardization  of 1361 

laboratory.    W.  S.  Hutchinson 1366,  2019 

stationary 336,  1345 

of  wire  cloth  or  plate  340 

steel  cloth 173 

plate 173 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Screens  suited  for  testing 1988 

submerged  trommel  at  Mill  125 1356 

table  of  clear  punched  slotted 169 

thickness  of 341,  371 

tin  bronze  plate 174 

plate    173 

Traylor  Centripact 1352 

trommel,  life,  cost,  and  details  of 352 

Tyler 171 

double  crimped 354 

mining  wire  cloth   1364 

used  for  free-settling  tests   465 

in  trommels    350 

variations  in  the  percentage  of  opening  of,  in  the 

mills 371 

versus  classifiers 368 

Vibracone  separators    1352 

Vibromotor 385 

wear  of 169,  170,  356 

screening  surface 1365 

wire  cloth,  of  copper,   brass,   phosphor-bronze, 

galvanized  and  tinned    1365 

wire,  for  gravity  stamps 170 

versus  plate    171 

with  round  holes  laid  out  in  equilateral  triangles    168 

squares   168 

W.  S.  Tyler  Co.,  double  crimped    370 

Screw  conveyors    861,  1582 

at  Mill  105 1636,  1637 

for  removing  jig  tailings    588 

table  of  sizes,  capacities,  and  speeds  of  1583 

tappets  for  stamps 188,  225 

Scrubber  for  cleaning  copper  plates    752 

Scrubbing  of  amalgamated  plates    758 

Seager,  J.  B viii 

Sealing  of  retorts 1519 

Sea  water,  use  of 1106 

used  in  concentration 1182 

weight  of 118S 

Second  hand  machinery,  experiments  with    2012 

Sectional  Blake  breaker 20,  21 

breaker  of  Blake  type    22 

guides  for  gravity  stamps 154,  155,  1268 

the  Denny    1269 

mortars,  Traylor  1267 

for  gravity  stamps 163 

rolls 81 

stamp  cams    192 

mill    227 

trommels 1353 

Denver  Engineering  Works  Company  revolv- 
ing grizzly 1353 

Sections  in  mills    1108 

Seeman,  L.,  centrifugal  pumps  870,  885 

classifier  with  helical  current 478 

sizing,  jigging,  and  wet  stamping 1182 

Stein  table    729 

Segregator  (classifier),  G.  G.  Gates 418 

Seitz  coal  loading  and  screening  machine    2018 

Selenide  silver  mill 1622 

Selenium,  atomic  weight  of 1188 

silver  ores,  concentration  of 1925 

Self -tightening  cams  193 

manganese-steel  mantles  for  McCully  gyratory 

breakers    1213 

Sell,  L.,  ball  mills 293 

Sellers,  William  &  Co.,  steam  hammer 12 

Seminole  mine  ore,  Krom  air  jig  on 825 

Separating    ^ 5 

concentrating  or  washing 318 

Separation  by  adhesion   831 

centrifugal  force    827 

crushing  and  screening 1566 

decrepitation    830 

and  screening ; 1565 

disintegration  and  screening 830 

heavy  solution 1156 

magnetic  concentration    790 

oil 831 

weathering   830 

combinations  of  principles  of 891,  1611 

ease  of 1117 

electrostatic    1199 

Huntoon's  experiments  on  telluride  gold  ores . . .    1566 

in  vanners,  principle  of   665 

miscellaneous  process  of    790 

of  fluorspar,  lead,  and  zinc.     F.  Julius 2028 

galena-sphalerite  ores  at  Broken  Hill 1611 

grease  from  diamond  at  Mill  188    1921 

mixed  sulphides.     R.  C.  Canby 1923 


Separation  of  molybdenite 1567 

three  minerals  on  jigs 590 

principles  used  in   889 

Separators  at  the  Kalgoorlie  mines,  hydraulic 2034 

Ball -Nor  ton  magnetic  separator 1527 

Buchanan  magnetic 803 

Clarkson-Stanfield  centrifugal 820 

classification  of  magnetic  separators    1521 

Cleveland-Knowles  magnetic  separator 1542 

cobbing  magnets 1531 

Conkling  dry  magnetic    809 

Cranberry  magnet 1530 

Dellvik-Grondal    804 

Ding's  magnetic    1540 

Edison  magnetic 812 

electrostatic    1549 

Eriksson's  electromagnetic 1529 

Ferraris  magnetic  799,  1525 

separator,  drum-type    1528 

final 480 

for  fine  materials    810 

steam 1091 

Forsgren's  electromagnetic  separator 1538 

Grondal  Nos.  2.  3,  4,  and  5  magnetic 1537 

Heberli  magnetic 799 

wet 810 

Hughes  Daviot  electromagnet    812 

Humboldt  magnetic   1530 

International  magnetic 1533 

Kessler  magnetic 811 

Knowles'  New  Century  magnetic 1541 

Leighton  magnetic 1528 

magnetic  with  conveying  belts   804 

Mechernich  magnetic  separator 1535 

Mumford  and  Moodie's 818 

Newaygo 1360 

of  the  primary-magnet  type 1521 

secondary  or  induced-magnet  type 1533 

Pape-Henneberg   ,  818 

Payne  magnetic 799 

Peck  centrifugal    828 

pneumatic 1553 

Sutton,  Steele  &  Steele  dry  table    1479 

principles  of  magnetic  separators 1521 

Rowand  magnetic 807 

Siemens  magnetic 803 

Ullrich  magnetic 1535 

Vibracone 1352,  1360 

Wenstrom  magnetic   800 

Wetherill  magnetic 804,  1521 

with  the  ore  falling  in  front  of  magnets 812 

Series  arrangement  of  machines 1110 

Serpentine,  specific  gravity  of 1189 

strength  of  301 

Setting  up  a  stamp 200 

Wilfley  tables 1468 

Settlers    777 

Settling,  bibliography  for 475 

beakers  or  jars 1146 

box  for  Johnston  vanner  concentrates 1502 

concentrates  in  barrels 1113 

definition  of  free  and  hindered 464,  1421 

dust  1099 

fine  slimes 1147,  1185,  1186 

hindered 610,  1460 

limit  of   455 

of  fine  grains 473 

pits  for  tin  ores 1083 

pond  in  the  Harz,  a  concrete 2020 

power  of  minerals,  effect  of 64 

rates  in  different  mediums 826 

ratio,  defined 4 

ratios 469,  471 

reservoirs  for  460 

slimes 1160,  1178,  1184 

use  of  chemicals  for 1413 

tanks    450,  1109 

and  pits  for  clay 1076 

at  mills 1408,  1776,  1777,  1779 

Morenci,  Arizona    1413 

baffle  board   459 

Berenger  and  Stingls  slime  tank : . .  1407 

Binkley  settling  system    1409 

calculation  of 454 

Callow  cone  1402 

capacities  of,  15  feet  square    455 

Colorado  Iron  Works  Company 1407 

data  from  the  mills  concerning    458 

details  of,  in  the  mills    458 

dimensions  of   453 


88 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Settling  tanks  for  graphite  ores    1075 

jig  concentrates 586 

ore  dressing,  a 2020 

kaolin 1077,  1149 

vanner  concentrates    647 

Merrill  cylindrical  clarifying  tanks    1406 

large  cones  1406 

practical  limits  of  settling  in 455 

relations  of  length  and  width  to  the  settling  . .     452 

speed  of  current  to  size  of  grain    452 

Scobey  system  in  Arizona 1411 

Sherman  system    1404 

slime   1419 

table  of  details  of  in  the  mills    456 

tests 1146 

on  fine  slimes 1176 

theory  476 

tube 621 

use  made  of  in  mills 889 

of  lime  and  alum  for   458,    459 

velocities,  curves  of 467,    473 

water 1104 

Setzpumpe  520,  595,  639 

Setzrad    478 

Severing  minerals,  methods  of   8 

or  detaching 5 

Sexton,  F.  H.,  the  ore  dressing  apparatus  at  Dal- 

housie  University,  Halifax 2048 

Seyss  dynamometer  for  work  of  crushing 305 

Shackelford's  patent  box-cleaning  device 1503 

Shaft  drier  at  mills 1803,    1822 

furnaces  for  drying 880 

roasting  furnace  at  mills 1663,  1759,  1765 

Shafts,  boxes  or  bearings  for    72 

for  amalgamating  pan   248 

jigs..    . 532 

diameters  of 533 

rolls  65 

steam  stamps 128 

Tremain  stamp 138 

trommels 351 

Shafting  in  mills    1108 

Shaking  amalgamating  tables  at  mills 1645,  1650,  1651 

in  South  Africa 1513 

feeders  at  mills 1691,  1837,  1868,  1869 

frame  for  Frue  vanners 645 

grizzly  at  mills    1690,  1866 

launders  at  mills 1693,  1694,  1761,  1811 

mercury  trap  774 

plates 740 

screens 341 

at  mills  1694,  1889 

for  dredges 1012 

testing  1137 

new  spring  for 2018 

table  for  picking 489 

Shallow-pocket  hindered -settling  classifiers 1384 

hydraulic  classifiers 389 

the  Richards    401 

Shanks  and  butts  of  stamp  shoes 181 

Shannon  concentrator 1931 

Copper   Company,   the  use  of  lime   for  slime 

settling  at  1416 

Shape  of  grains,  effect  of,  on  slime  tables   694 

particles,  effect  on  free  settling 464 

screen  holes   369 

Sharpless,  F.  F 121,126 

amalgamated  plates 750,  767 

Atlantic  mill,  Lake  Superior 1183 

Ball,  Leavitt,  and  Allis  stamps 142 

stamp  keys 188 

steel  ends  of  tappet  keys 227 

temperature  of  water  for  amalgamation  .....      789 

Sharpneck  steam  stamp 136,  142 

Sharwood,  W.  J.,  definition  of  slimes 1398,  1419 

Shaw  mine,  Huntington  mill  at 281 

Sheaves  for  ropes    1095 

Shells  for  rolls  66 

net  cost  of 69 

Shepard,  F.  E.,  tube  mills  at  the  Gold  King  mill,  Col- 
orado     2014 

Sheppard  coal  jig 642,  538,  586,  643 

Sherman,  F.  W.,  centrifugal  roller  mill    1313 

classifiers  at  Mill  132 1729 

Huntington  mill 1313 

improved  Huntington  mill  at  Mill  132  . .  1728,  1729 

re-grinders  at  Mill  132   1728,  1729 

separating  and  distributing  tanks  at  Mill  132.    1728 

settling  tanks  at  Mill  132 1404,  1729,  1730 

slimer    1506 


89 


Sherman,  F.  W.,  system  of  settling  tanks 1404 

slime  treatment  at  Mill  132    1729 

wet  concentration  by  the  Sherman  system. ...  1419 

slime  concentrator 2023 

Shield  for  grease  from  stamp  cams 194 

of  canvas  for  stamps 177 

Shinier  and  Reifsnyder  sampling 884 

Shims  for  rolls 74 

Shipping  concentrates 1112 

expenses   H23 

Shoe  and  die  channels  in  amalgamating  pans 246 

Shoes  and  dies  for  grinding  pans,  wear  of 1 284 

life  of   184,  185,  2011 

of  stamps,  table  of,  wear  of 182 

wear  in  amalgamating  pans    249 

at  mill  117 1668 

false,  for  stamps    229 

for  amalgamating  pans      245 

gravity  stamps 181 

life  of 1277 

settlers 777 

steam  stamp 120 

life,  etc 122 

of  Nordberg  steam  stamps    1249 

put  on  gravity  stamps    201 

shanks  and  butts 181 

Sholl  pneumatic  stamp 141,  143 

Short  head  and  concaves,  Gates'  breaker  with 1208 

Shot  for  jig  beds 574 

Shovel  for  sampling   1570 

vanning 1152 

Shoveler,  mechanical 885,  879 

Shoveling,  sampling  by    844 

Siberia,  dredging  in    1009 

gold  milling  in.     L.  Tovey 2038 

Sickening  of  mercury 750,  751 

Side  adjustment  of  rolls 71 

bump  tables  comparison  with  end-bump 682 

plane  surfaces  667 

Rittinger  table 667 

Stein,  Corning,  Bilharz,  and  Luhrig 669 

with  plane  surfaces 667 

•  discharge  for  jigs 580 

hill  site  for  mills  1085 

jerk  tables,  comparison  of  Wilfley  and  Rittinger  679 

Bartlett  table 678 

Cammett  tables 676 

Dodd  table 675 

Hallett  table 675 

Overstrom  table    679 

Wilfley  table 670 

with  riffled  surfaces 670 

Woodbury  table 676 

of  amalgamating  pan 244 

plunger  jigs    529 

shake  vanners 645,  1499 

Frue  vanner 1499 

Horn  rotary  slime  concentrator   1499 

Johnston  concentrator   652 

Norbom  concentrator 652 

Tulloch  concentrator    652 

versus  end-shake  655 

Siderite.     See  also  Iron. 

angle  of  nip  required  to  crush   94 

calcining  for  magnetism 1544 

separated  by  decrepitation 829 

by  magnets 790 

specific  gravity  of  1189 

Siemens  &  Halske  magnetic  separator 798 

rolls  2010 

magnetic  separator 803,  834 

Sierra  Buttes  mill,  amalgamated  plates  in 748 

Sieve  box  for  jigs    524 

for  mill  testing 1996,  1997 

frames,  double  iron 540 

for  jigs    538 

iron   539 

hole  on  jigs,  size  of 573 

scale 366,  1361 

at  mills 1361 

for  jigging 606 

testing  screens 1138 

I.  M.  M.  standard  laboratory  sieve  scale 1362 

scales 365,  384 

in  American  mills,  table  of 1361 

mills  366,  367 

limits  of    368 

surface  affecting  capacity  of  jigs    600 

wires  and  prices 547 

Siever  coal  jig  641 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Sieves    

See  also  Screens. 

and  plungers,  sizes  of,  in  mills 528-529 

brass  wire  on  jigs  at  Mill  121 1686 

drop  between,  on  jigs 549 

for  hand  jigs    499 

three-mineral  separation    590 

two-mineral  separation 589 

length  of  in  jigs    592 

life  of  in  jigs    546 

number  of,  on  jigs    588 

skimming  in  jigs     576 

slope  of,  in  jigs 548 

width  of,  in  jigs 591 

Sifting  and  decrepitation  5 

Silberau  mill 1087,  1136 

mill  at 1176,  1177 

Ems 11C2,  1135 

sieve  scale  in   367 

Silesia,  mill  in 1186 

Silex  liners  for  tube  mills  at  Mill  143 1770 

Silica  crushed  in  Blue  Bird  mill 222 

for  melting 784 

Silicon,  atomic  weight  of 1188 

Siller  &  Dubois  ball  mill   293 

Sills  and  girders  for  steam  stamps    114 

for  Nordberg  steam  stamps 1247 

Silver  Age  mill xxv,  915 

amalgam 730,  731,  747,  1512 

preparation  of   754 

amalgamated  plates    747 

apparatus  used  for  amalgamation   731 

assay  for  in  Mill  55   304 

Mill  68 303 

atomic  weight  of 1188 

combination  mills 1039 

-copper  ores,  mills  for 973,   984 

cost  of  producing    1960 

Cup,  British  Columbia,  handling  of  ore  at  the. 

G.  Attwood    2039 

fineness  in  bullion 785 

horn,  crushed  in  Harshaw  mill    207 

in  Lake  Superior  copper 766 

Islet  mill 1179 

stamps 226 

King  mill,  Fleming  dewatering  wheel  at    1590 

Park  City,  Utah   2038 

H.  L.  J.  Warren 2036 

J.  H.  Steele   2044 

Lake  mill 1046,  1092,  1771 

dewatering  screen  at  Mill  139    1751 

-lead  ores,  crushed  by  Blake  breaker  and  Chili 

mill    271 

ores,  mills  for 925,  936 

treated  at  Broken  Hill  by  Collom  jigs    515 

mills 1039 

settlers  in   777 

milling,  bibliography  for   1173 

cost  of 1134 

ore,  amalgamation  of  1167 

crushed  at  Geddes  and  Bertrand  mill 100 

by  arrastras    238 

leaching  and  amalgamating 1167 

loss  of , 1117 

mills  for    925,  1015,  1016,  1035 

pan  for  testing 1157 

separated  by  oil 831 

treated  in  amalgamating  pans 348 

plated  amalgamated  plates   179,  747 

at  Mill  143 1769 

copper  plates,  coated  with  mercury 747 

comparison  of  with  plain  copper 748 

plating  as  a  preservative  for  copper  plates 1512 

discussion  of.     A.  Clark    2024 

effect  on  fineness  of  amalgam 763 

method  of 754 

plates  coated  with  amalgam 750 

Plume,  Colorado,  description  of  two  mills  at  ...  2043 

products  of  stamping 139 

proportion  of  gold  and  silver  on  successive  plates  763 

in  daily  and  hard  amalgam 764 

Reef  mill 1174 

removed  by  picking    486 

specific  gravity  of  native   1189 

treated  in  mills  44.  46,  47,  48 486 

used  on  copper  plates 748 

per  square  foot  of  copper  plate    754 

wet  and  dry  crushing 224 

"Silverton  Brand"  elevator  belting  at  Mill  126   1707 

Colorado,  electric  power  at 1092 


336        Silverton,   Colorado,  hammers  used  at 10 

mill  at 1046,  1050,  1052 

typical  mill  of.     W.  G.  Swart    2042 

Mining  Co.,  mill 1050 

Simmer  and  Jack  mill,  details  of  stamps 221 

notes  on.     G.  O.  Swart 2035 

Deep  Ltd.  ore  reduction  plant  of 1651 

Simonds,  E.  H.,  place  and  value  of  small  ore  tests. .   2049 
Simonnet  and  Chaumeis,  American  gold  stamp  mill- 
ing     1178 

Simple-cylinder  steam  stamp  at  Mill  179 1897 

jigging  mills 892 

using  power  jigs  900 

steam  stamp  at  Mill  182 1909,    1912 

Simplex  ore  feeder    1578 

Simplicity  in  machines 1097 

mills 1004 

Simpson  pulverizer  2014 

Single  cylinder  and  compound  steam  stamps,  com- 
parison between 1254 

issue 167 

roll  crusher,  McLanahan  and  Stone 1241 

table  of  sizes,  power,  and  weights 1241 

spigot  hydraulic  classifier  at  Mill  180   1902 

stage  crushing   ; 103 

stamp  battery,  the  disadvantages  of  the 2013 

versus  double  discharge  on  stamps    209 

Sintering  slimes  at  Mill  129   1717 

Siphon  separator 520 

at  Mechernich 421,  475,  477,  478 

Sites  for  mills 1085,  1124 

Size  and  shape  of  mouth  of  breakers   54 

of  amalgamated  plates 737 

feed  to  hydraulic  classifiers 389 

grains  affecting  capacity  of  jigs   600 

for  film  sizing    707 

jig  bed 575 

holes  in  screens 210 

stamp  screens,  methods  of  designating  ....      172 

jig  sieves  and  plungers 528 

material  for  roasting  for  magnetism    814,    815 

treated  by  amalgamating  pans 248 

needles  for  screens    172 

sieve  hole  on  jigs 573 

slime  tables 684,  696 

Sized  feed  for  Wilfley  tables 1473 

versus  classified  feeds  for  the  Wilfley  table   1478 

Sizers  Browne  hydrometric  conical    409 

Keedy  dry-ore  sizer    1555 

Sizes  and  weights  of  ore  for  sampling 851,  852 

fed  to  jigs,  range  of  606 

vanners 658 

Wilfley  table 674 

of  Akron  Chili  mills,  table  of    1308 

Allis-Chalmers  toothed  and  corrugated  rolls, 

table  of 1243 

Alsing  tube  mills,  table  of 1296 

American  Process  Company  driers 1598 

Argall  driers ! 1600 

Austin  gyratory  breakers,  table  of 1210 

Blake  breakers 17,  21,  24 

boxes  for  rolls   72 

cam  shafts    191 

Comet  breaker 41,  45,  46 

crushed  product  from  breakers 1218 

diagram  of 1219 

Denver  Engineering  Works  Company's  Blake 

breakers,  table  of   1204 

Dodge  breaker 30,  31 

double-cone  hydraulic  classifiers,  table  of 1381 

Farrel  Blake  breakers,  table  of    1200 

feed  for  gravity  stamps    207 

Ferraris  ball  mills,  table  of 1300 

patent  tables,  table  of    1490 

Gates  ball  mills,  table  of 1301 

breakers    38,  46 

style  "K"  breakers,  table  of 1208 

with  short  head  and  concaves,  table  of  .  .    1209 

grizzlies 339,  340 

Hathaway  gyratory  breakers,  table  of 1217 

Humphrey  rolls,  table  of 1235 

Imperial  screens,  table  of    1350 

improved  Huntington  mills,  table  of 1312 

iron  pipe 405 

Jeffrey  swing  hammer  pulverizers,  table  of . . .    1322 

Kennedy  gyratory  breakers,  table  of 1214 

Kent  roller  mill 1304 

Knowles  New  Century  magnetic  separators, 

table  of 1542 

Krupp  gyratory  breakers,  table  of 1215 


90 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Sizes  of  La  Point  flour  gold  separators,  table  of 1510 

McCully  breakers  44 

table  of  1212 

McLanahan    and    Stone    single-roll  crushers, 

table  of     1241 

mortar  blocks 145 

new  Humboldt  concentrator 1494 

ore  hand  picked    487 

particles,  effect  on  free  settling 464 

Pilling  air  hoists,  table  of   1609 

products  of  mills 1116 

Richards'  pulsator  classifier,  table  of    1390 

jig,  table  of    1455 

rolls  64 

samples 1575,  1576 

Samson  breakers,  table  of 1203 

screens 168,  169,  170 

for  free-settling  tests 465 

screw  conveyors,  table  of 1583 

shoes  and  dies 182,  183,  184 

Stroud  mills,  tables  of  1320,  1321 

Sturtevant  balanced  rolls,  table  of 1234 

Sturtevant-Dodge  type  breakers,  table  of 1205 

trommel  screens 352 

Wild  roller  mills,  table  of   1304 

Wilfley  roasting  furnace 1548 

treated  by  jigs 605 

kieves    726 

rolls  63 

slime  tables    693 

vanners  648 

Wenstrom  magnets 801 

Sizing 384,  892 

amount  necessary  for  Hancock  jig 1441 

and  assaying  tests 1163 

before  amalgamation    1514 

J.  O.  Dimmick 1520 

dry  jigging 822 

jigging 629,  631,  1463 

close ....2022 

sorting 891 

box,  the  Dodge 416 

by  a  water  film  on  a  surface 1611 

screens    1611 

comparison  between  screen  and  hydraulic 2019 

followed  by  agitation    891 

magnetism  and  by  sorting 891 

in  mills,  use  made  of 889 

limit  of  screen  sizing    1361 

of  emery  1079 

principles  of  screen 1361 

screen  versus  hydraulic.     S.  I.  Hallett 2020 

screens  336,  1345 

bibliography  for 384 

testing  of 1170 

test  and  assays  of  feed  and  products  of  Hunting- 
ton  mills  1317 

on  ball  mill  pulp 1302 

Browne  hydrometric  sizer 410 

Bryan  mill  product 1310 

Chili  mill  product 269,   271 

cyanide  tailings 1107 

Dodge  pulverizer  product    262 

feed  and  discharge  of  Abbe  tube  mill 1290 

and  products  of  Drake  cone  classifiers  ...  1668 

of  Huntington  mills   1316 

tube  mills  1290 

to  flotation  plant  at  Mill  130 1721,  1724 

Harz  jigs  at  Mill  144 1772,  1773,  1774 

Woodbury  slime  classifier  at  Mill  162  .    1449 

Griffin  mill  product 284 

at  Mill  105 1636 

Hancock  jig  feed  and  middlings 1443 

Heberli  mill  product 259 

Huntington  mill  product 281,    1669 

mill  feed  at  mills 1750,    1772 

ore  broken  by  hand  and  machine   13 

product  of  De  Kalb's  classifier 1402 

fine  grinding  system  at  Mill  105    1638 

settling  tanks  at  Mill  144 1776,  1777,  1779 

Sherman  settling  tanks  at  Mill  132 1406 

spitzkasten  at  Mill  144 1777,  1778 

Sturlevant  breaker   33 

pulp  from  Bryan  mill,  high-speed  rolls,  and 

Huntington  mill 1317 

coarse  and  fine  rolls  at  Mill  162. .  1328,  1329 

grinding  pans 1284 

at  Mill  130 1720,  1724 

sand  treatment  at  Mill  117 1671 

sample  grinder  product   257 


Sizing  test  on  Schranz  mill  product 276 

spigot  products  of  Richards'  vortex  classifiers 

at  Mill  144 1775,  1776,  1778 

stamp  mortar  product  at  Mill  180 1905 

Sturtevant  mill  product 288 

tailings  and  concentrates  from  stamps  and 

Lane  Chili  mill,  comparative   1309 

tailings   and  feed   of   classifier  jig  at   Mill 

120 1453 

of  Mill  174 -. 1887 

Tustin  mill  product    264 

Woodbury  jig  tailings  at  Mill  162. .  1449, 1450, 1451 

tests,  film,  on  quartz  and  galena 707 

from  Mill  78   667 

graphical  representation  of   1139 

on  breaker  products  47 

Bryan  mills.     F.  P.  Probert 1323 

classifier  products 461 

crushed  ore 303 

products 307,  312 

crushing  machines 315 

gravity  stamps 210 

hindered-settling  products 612 

jaw  and  spindle  breakers 53 

jig  products 607,  608 

products  of  Gates  and  McCully  breakers  . .       45 

Richards'  hydraulic  classifier    406 

quartz  and  galena,  results  of    719 

Richards'  classifier  products 406 

roll  products 98 

slimes  and  sands.     A.  S.  Denny    2019 

stamp  and  Bryan  mill  products 273 

stamped  ore  222 

steam  stamps 135 

Tremain  steam  stamps 139 

trommel  and  classifier  products 1140,  1144 

products     381,  382 

Tustin  mills  and  stamps   309 

vanner  products 664,  666 

to  show  grinding  by  centrifugal  pumps    870 

Skewes,  E.,  washing  tin  slimes  from  Red  River,  Corn- 
wall     1182 

Skidmore,  W.  A.,  breakers 60 

Dooge  breaker 60 

two-stamp  steam  battery 143 

Skimming  launders,  in  Binkley  settling  system 1409 

of  hand  jig 497 

jigs 506,   576 

versus  automatic  discharge  on  jigs 584 

Skinner,  H.  R.,  elevators  and  conveyors  on  the  Rand     884 

Skips  for  ore   1057 

Skirt  boards  for  belt  conveyors    859 

Skylights 1100 

Slag  formed  in  melting 784 

Slate  picker    489 

a  mechanical.    A.  H.  Roberts 2021 

strength  of   301,   302 

weight  of 1190 

Sledging   480 

by  hand    10 

hammers 56 

Sliding  block  mechanism  for  jigs 533 

ore  feeder     855 

jig,  construction  of 525 

mechanism  534 

Slime  agitators,  Blaisdell 1602 

classifiers,  classifier  jig 1447 

Woodbury  slime  classifier    1447 

concentration  of  gold  mill.     W.  E.  Darrow  ....    2045 

concentrators 644 

classification  of    1464 

Dimmick  slime  table    1507 

Horn 1499 

Geyer    460 

vanners  1499 

definition  of,  W.  A.  Prichard 1419 

T.  H.  Collins   1419 

M.  P.  Boss 1420 

jig 518,639 

ponds,  the  use  of  a  dredge  for  excavating.     Dr. 

Kosmann    2039 

pressed  and  dried 1075 

settling.     H.  S.  Nichols  on 1414 

E.  A.  H.  Tays 1419 

by  aid  of  milk  of  lime.     T.  K.  Rose 1419 

the  Sherman  system 1419 

H.  S.  Nichols 1420 

M.  D.  Stackpole  1419 

relative  efficiency  of  heat  and  electrolytes 1415 

tanks  ..       1419 


91 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Slime  settling  tanks  with  steam  coils  at  Mill  144. .  . .  1779 

theory   1149 

use  of  chemical  to  promote 1413 

heat  to  promote 1695,  1696 

tables 1114 

at  Clausthal  606 

Mill  177   1893 

bibliography  for 727 

capacity  of 697 

circular,  quantity  of  water  on 694 

specific  gravity  of  feed 693 

classification  of  pulp  for    693 

slimes  for   720 

compared   692 

with  belt  film  tables     698 

comparison  of  different  circular 2023 

construction  and  operation   684 

convex  versus  vanners 691 

cost  of     691 

coupled  with  kieve   1110 

vanner    1 1 10 

Wilfley  table 1110 

density  of  pulp  on 695 

diameter  and  working  radius  of 697 

fixed  circular  convex 689 

for  testing 1154 

unwaterer  880 

investigation  on 707 

operation  of 692 

revolving  circular  concave 692 

convex 686 

scrapers  on 696 

size  of  grains  treated 693 

slope  of    694,  719,  720 

speed  of    696 

step  form    689 

surface  for    695 

testing  1172 

thickness  of  water  film  on 695 

velocity  of  water  current 719 

water  films  on 718 

for 695 

work,  effect  of  shape  of  grains  on 694 

tanks,  Berenger  and  Stingls    1407 

Colorado  Iron  Works  Company 1407 

use  of  steam  pipes  in 1695,  1696 

treatment  at  mills   1642,  1671 

in  Arizona,  Scobey 1411 

on  the  Rand 1410 

use  of  steam  for  settling.     A.  Salkinson 2020 

what  constitutes  a.    W.  J.  Sharwood 1419 

aimers 884,  1504 

Akens  and  Evans   1500 

Bartsch  rotary  percussion  table 1497 

belt  percussion  table 1496 

comparison  of  Woodbury  and  Evans  slimers  at 

Mill  162  1451 

James    1491 

Luhrig  1496 

Sherman    1506 

use  of  riffles  on 1498 

Wilfley 1504 

table  as    1478 

Slimes  and  sand  separation  at  Mill  106 1040 

at  Tarnowitz,  control  of 2047 

A.  W  Warwick,  on  finely  ground    1420 

chemicals  for  settling.     W.  R.  Whitney 1419 

colloidal  silicic  acid  in.     W.  A.  Caldecott 1419 

theory  of  Whitney  and  Ober 1419 

definitions  of 1394,  1397 

De  Kalb  on 1419 

department  at  Mill  163 1848 

effect  of  heat  in  settling  slimy  water 1414 

H.  A.  Megraw  on   1419 

in    Cceur    d'Alene,    the    saving    of.      W.    C. 

Clark 2041 

investigation  of  slimes  by  the  United  States  De- 
partment of  Agriculture 1400 

moisture  in 1107 

plant  at  Mill  162 1846 

question  1120 

settling  of 1147 

roasted.    P.  Argall 1419 

steel  bar  riffles  for  gold 2026 

ultra  microscope  for  the  study  of 1401 

what  constitutes.    A.  W.  Warwick 2020 

Slimy  water  affecting  jig  work 599 

Slip 1149 

or  slime  kaolin 1077 

Slipping  of  belts    1094 


Slocan,  British  Columbia,  treatment  of  ores  by  flota- 
tion processes 1526 

Slope  and  length  of  trommels 378 

angles,  measurement  of 1159 

table  of 1191 

effect  of  in  trommels    377 

of  amalgamated  plates    737,  745 

amalgamating  plates  at  mills 1622,  1624,  1627 

in  California 1619 

Argall  drier 881 

belt  conveyor  at  mills 1667,  1681,  1707,  1708, 

1709,  1710,  1759,  1760,  1762,  1763,  1764,  1828, 
1831,  1851,  1860,  1861,  1862,  1863,  1868,  1869, 

1882,  1883 

tables 698,   700 

bin  apron  at  Mill  154    1815 

at  mills          .  .  1624,  1631,  1633,  1661,  1663,  1709, 

1727,  1743,  1756,  1760,  1761,  1762,  1763,  1802, 

1803,  1805,  1831,  1833,  1897 

canvas,  blanket  and  carpet  tables  703 

tables 700,701 

at  mills 1627,  1696,  1755,  1779 

chutes   843 

concentric  trommel  at  Mill  154   1816 

cylindrical  drier  at  Mill  135 1735 

dewatering  screens  at  Mill  167 1858 

elevators  at  mills 1715,  1818 

Evans  classifiers  at  Mill  161 1838,  1839 

slime  tables  at  Mill  177 1893 

feed  chute  at  Mill  179  1897 

sole  for  classifiers 437 

spitzlutte 423 

film  sizing  tables 707 

floors  in  mills 1089 

Mill  161   1841 

German  sweeping  table  703 

grizzlies 339 

at  mills  .  .      .  .  1624,  1631,  1635,  1655,  1660,  1661, 

1737,  1759,  1792,  1805,  1821,  1828,  1831,  1853, 

1860,  1888,  1892,  1909,  1913 

Hallett  table 676 

Hooper  air  jig 822 

Impact  screens  at  Mill  151 1803 

jig  hutches 523 

screens 548 

launders 873,  874,  877 

at  Mill  152 1812 

Linkenbach  slime  table  691 

ore  bin  bottoms 842 

picking  belts  at  mills 1806,  1882 

Pierce  amalgamators 1517 

plates 179 

revolving  driers  at  Mill  138    1746 

Roberts  slime  table 691 

Robins  belt  conveyors  at  mills ....  1805,  1806,  1807, 

1808,  1809,  1810,  1811,  1812,  1813,  1821,  1824, 

1825,  1826,  1876 

rotary  driers  at  Mill  186 1917 

round  tables  at  Mill  180 1904,  1905 

Salzburg  table 683 

scraping  conveyors  at  mills 1662,  1709 

screens 176 

at  Mill  158 1824 

shaking  feeders  at  mills 1837,  1868,  1869 

grizzlies  at  Mill  170 1866 

launders  at  Mill  152 1811 

screens  at  Mill  111 1655 

sides  of  spitzkasten    440 

•    slime  tables 684,  694,  719 

sluices 723 

splash  plates 739 

Stein,  Bilharz,  and  Luhrig  tables 670 

tables  in  film  sizing  tests 707,  718,  719 

on  dredges   1012 

tower  screen  plates  at  Mill  158. ...  1822,  1824,  1825 

trays  on  Sherman  slimer 1506 

trommel  conveyors  at  Mill  125 1700 

trommels 347,  349 

at  mills  .  .  1655,1681, 162'8  1685,  1690, 1691,  1692, 
1693,  1701,  1702,  1703,  1710,  1714,  1724,  1725, 
1737,  1742,  1743,  1749,  1750,  1751,  1752,  1792, 
1818,  1828,  1829,  1832,  1837,  1838,  1842,  1843, 
1846,  1853,  1854,  1855,  1857,  1869,  1876,  1877, 
1882,  1888,  1898,  1913 

undercurrents 726 

vanners 648,  653,  654,  659,  660 

table  of,  in  degrees  and  inches 1191 

Wilfley  slimer  trays 1506 

Slotted  holes  compared  with  round  holes  in  screens     169 
Sludge   901 


92 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Sludge  from  hand  jigs 498 

mill    902 

practice  of  Missouri -Kansas  district   2043 

tank,  Ramsey 446 

Sluggers,  rolls  with 104 

Sluice,  new  Australian  shaking 2029 

plates 740 

article  on    2012 

riffles     1464 

Sluices,  Bowie's  figures  on  sizes  and  carrying  power 

of 723 

for  corundum  ore   1078 

riffles 723 

on  dredges 1007,  1008,  1012 

undercurrents 726 

Small  steam  stamps    136 

Smaltite,  specific  gravity  of 1189 

Smarts  ville  and  Mooney  Flat,  arrastra  at    238,  290 

Smelting  compared  with  concentration 1 

Smith,  F.  C.,  stamping,  amalgamating,  and  concen- 
trating telluride  ore 1175 

O.,  gravity  stamps    223 

gauges  for  wire  and  plate   1174 

R.  G.,  settling  fine  slimes 1185 

Vaile  filter  press  at  Mill  101 1628 

Smithsonite  and  limonite  separated  by  roasting  and 

magnetism    814 

specific  gravity  of  1189 

Smittem 894,  901 

Smooth  belts  for  Frue  vanners  at  mills . . .  1704,  1868,  1870 

Johnston  vanners  at  Mill  167 1858,  1859 

Smuggler  Mining  Company   1700 

mill xxvi,  933 

Union  mill,  Telluride,  Colorado   1176,  2043 

Mining  Co.,  mill 1016 

Smyth  mill,  stamps  at   228 

Smyth's  formula    1944 

Snake  River,  Caribou  riffle  on 1509 

dredges  on   1009 

Idaho,  dredging  on    1013,  1181 

hydraulicking  on 1006 

use  of  C.  A.  La  Point  gold  separator  on . . .   1510 

Snyder,  F.  T.,  amalgamating  plates   741 

discussion  of  costs,  micrometer  gauge  for  ore 

grains    1178 

gyrating  amalgamated  plates    788 

vanner    728,  2022 

importance  of  mill  constants  for  the  engineer    2048 

magnetic  separation   1568 

measurement  of  screen  openings    1362 

metallurgical  standards    2019 

micrometer  gauge 1138 

mortar  at  Newton  mill,  Colorado    227 

sampler 884 

shoes  and  dies  181 

Snyder  micrometer  caliper 1362,  1366 

magnetic  separator.     F.  T.  Snyder 2027 

sampler 846,  1572 

at  mills 1667,  1832 

vanner 657 

Soap  for  belts    1094 

Soapstone  for  lubricating 1097 

Societe  Miniere  du  Card,  Ferraris  ball  mill  at 1300 

Sockets  in  stamp  bosses 187 

Soda  for  melting 784 

Sodium  amalgam 730,  1156 

for  brightening  mercury 785 

used  in  stamp  mills    752 


atomic  weight  of 

phosphate  for  brightening  mercury. . 

Soft  rock  phosphate 

Solution  for  silver  plating   

Sondericker,  J 

Sorted  products  obtained  by  air 

Sorting    

before  sizing 

belts  at  Mill  137  

Robins  sorting  belt 

by  free  settling    

hand    

breaking  for 

picking  tables  or  belts  for 

hindered  settling 

settling  in  air     

columns,  area  of 

defined      

for  Richards'  classifier. 

cost  of  hand  sorting 

followed  by  agitation   . . . 
suction 


1188 
785 
895 
755 
viii 
819 


1438 

1438 

1611 

1435 

1435 

1435 

1611 

1611 

403 

387 

429 

1438 


Sorting  in  small  mills,  hand.     A.  W.  Warwick 2032 

tables,  Allis-Chalmers  annular  picking  or  sorting 

table    1435 

and  belts,  speed  and  capacity  of   1438 

at  mills 1617,  1892 

Humboldt  picking  table 1437 

Krupp  picking  tables 1435 

tube,  Bardwell 1988 

investigation  of  free  settling    465 

discussion  of  results  of 467 

results,  fastest  grains    466 

slowest  grains 466 

specific  gravities  of  minerals  used  for  tests     465 

use  made  of  in  mills 889 

Source  of  water 1105 

South  Africa,  diamond  washing  in 333   1178 

gold  mills 1149 

hand  picking  in 482 

jig  beds  in    574 

mills  in 1173,  1179,  1186 

picking  tables  in 491 

screen  meshes    172 

stamp  practice 221 

stamps  in   225 

use  of  lime  for  settling 459 

weight  of  quartz  in 1185 

Carolina,  phosphate  dressing  in 1183 

washing  in   1180 

Clunes,  false  bottoms  in  mortar 180 

stamp  dies    179 

United  mill,  mercury  wells  in 768,  769 

plates  in   744 

splash  board 177 

Spring  Hill  mine,  false  bottoms  in  mortars 180 

Southwest  Missouri,  clearance  of  plunger   in    blende 

jigs  in   530 

connecting  rods  in  blende  jigs  in 530 

shafts  in  Cooley  jig  in 532 

Space  between  rolls    64,  89 

cost  of 1126 

308 
1503 
1176 
480 


Spaced  rolls,  product  of,  crushing  Przibram  ore  . . . 

Spadone  concentrator  belt,  the 

Spain,  iron  ore  dressing  in    

Spalling,  definition  of 


11 


55,56 


hammers 

Span  of  wire  rope 1095 

Sparre  circular  oscillating  table 691 

J.  von xx 

criticism  of  Rittinger's  theory 476,  639 

slime  tables    728 

surface  sizing 729 

Spathic  iron  ore  roasted  for  magnetism 814,  815 

separation  at  Allevard 9,  492 

Special  forms  of  rolls  104 

Specific  gravity  affecting  momentum 4 

separation 889 

changed  by  roasting 828 

definition  of 3 

difference  in  for  jigging 609 

effect  on  cost  of  milling 1128 

free  settling    464 

slime  tables    693 

of  copper    3 

jig  beds 574 

mercury 730 

minerals  and  metals 1188 

effect  of 3 

ocean  water  3 

oils 1098 

quartz 

rock  affecting  power  consumption 313 

sea  water    1106 

settling  power    4 

test 1159 

Specimen  stamp    1111 

Speed.     See  also  each  machine. 

and  capacity  of  picking  tables  and  belts    1438 

height  of  drop,  limits  of,  due  to  mortar 218 

power    215 

kept  constant 1092 

of  Abb5  tube  mills  at  mills 1626,  1677 

Akron  Chili  mills,  table  of    1308 

Allis-Chalmers  rolls  at  Mill  179 1898 

suspended  frame  vanner    1503 

vanners  at  Mill  136   1739 

Alsing  cylinder 267 

amalgamating  pan 243,  249 

American  Blower  Company  fans  at  Mill  151  . .  1804 

Argall  drier    881 

arrastra 238,  239 


93 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Speed  of  Atwood  amalgamator 

Austin  gyratory  breakers,  table  of 
ball  mill 

at  Mill  159 
Ball-Norton  magnet 
Bartlett  shaking  picking  table 


776 
1210 
260 

1828 
798 
489 


belt  conveyors  at  mills  ......  1667,  1670,  1690,  1691, 

1707,  1708,  1709,  1710,  1759,  1760,  1762,  1763, 

1764,  1771,  1772,  1819,  1828,  1831,  1853,  1868, 

1869,  1882,  1883,  1913 

of  Wetherill  magnetic  separator  ...........    1523 

percussion  tables  .......................    1496 

tables    ..............................  698,  700 

belts  .................................  ...    1093 

of  Frue  vanners  at  Mill  127  ..........  1711,  1712 

Bilharz  jig  .............................  504,  518 

Blake  breakers  ........................  17,  21,  24 

at  Mill  139  ..........................   1749 

Bogardus  mill    ...........................     260 

Bradford  jig  .............................     503 

Brink  &  Hiibner  disintegrator  ..............     286 

Bryan  mill    ..............................     272 

mills  at  Mill  173  ...................  1879,  1928 

Buchanan  magnetic  separator  ..............     803 

bucket  conveyor    .  ........................     861 

buckets  on  dredge  ........................    1008 

Butters'  centrifugal  pumps  at  mills  ......  1671,  1672, 

1674,  1677 
Byron  Jackson  centrifugal  pumps  at  mills  ....    1662, 

1673 
Callow  screens  at  mills  ...........  1661,  1662,  1687 

Card  tables  at  mills  ..............  1660,  1770,  1830 

centrifugal  pumps  ......................  869,  870 

at  mills  ....  1694,  1695,  1711,  1712,  1890,  1899, 

1904,  1903 
Chalmers  &  Williams  vanners  at  Mill  122  ____    1687 

Chili  mill  ..............................  269,270 

mills  at  mills   ................  1767,  1893,  1898 

cleaner  jigs  at  Mill  148  ....................    1793 

clean-up  barrels  ..........................     265 

at  Mill  111  ..........................    1656 

pans  ..................................     252 

Cole  shovel-wheel  at  Mill  124    .......  ......    1693 

Comet  breaker  ...........................  41,  46 

concentric  trommels  at  Mill  154    ...........    1816 

cone  mill  ................................     256 

Conkling  jig  .............................     503 

conveying  and  draining  belts  at  Mill  130  ----    1721 

picking  belts  at  Mill  139  ..............   1749 

conveyors   ...............................     861 

Crane  log  washer  at  Mill  95  ...............    1617 

Crickbpom  wash  trommel  .................      331 

Cummings  granulating  mill  ................     255 

Cyclone  pulverizer    .......................     288 

cylindrical  driers  ..........................     880 

De  Laval  cream  separator  .................     827 

Denver  Engineering  Works  Company's  Blake 
breakers,  table  of   ......................    1204 

dewatering  wheels  at  Mill  144  ..........  1772,  1773 

disc  conveyors  ............................    1583 

Dodge  breaker  ...........................        30 

pulverizer  ..............................     262 

dredges  ..................................    1009 

elevators  ..............................  862,   863 

at  mills  ......  1667,  1681,  1685,  1689,  1690,  1691, 

1693,  1701,  1702,  1703,  1707,  1710,  1711,  1725, 

1727,  1728,  1729,  1742,  1743,  1749,  1750,  1752, 

1753,  1755,  1759,  1760,  1761,  1762,  1763,  1771, 

1772,  1774,  1792,  1793,  1804,  1822,  1824,  1825, 

1829,  1837,  1838,  1839,  1840,  1842,  1843,  1844, 

1845,  1846,  1847,  1853,  1854,  1855,  1857,  1858, 

1866,  1867,  1869,  1871,  1877,  1880,  1883,  1888, 

1889,  1890,  1898,  1910,  192$ 

Ellenbecker  table    ........................     681 

Evans  jigs  at  mills  ____  1837,  1838,  1843,  1844,  1845, 

1936 
round  tables  at  Mill  162  .................    1846 

slime  tables  at  Mill  177  .................    1893 

Fans  at  Mill  186  .....................  1917,  1918 

Parrel  Blake  breakers,  table  of    ............    1200 

feeders  at  Mill  125  .......................    1700 

Ferraris  magnetic  separator    ...............     799 

Prayer  centrifugal  pumps  at  Mill  159    ......    1829 

Frenier  sand  pumps  at  mills  ......  1708,  1769,  1812 

spiral  sand  pump   ......................     871 

Frue  vanners  at  mills  ......  1625,  1627,  1662,  1689, 

1694,  1695,  1711,  1712,  1844,  1865,  1868,  1870, 

1029 
Garland  disc  conveyors  at  Mill  124    ........    1695 

Gates  breaker   ...........................  38,  46 


Speed  of  Gates  breakers  at  mills    1706,  1821 

style  "  K  "  breakers,  table  of 1208 

Gebriider    Sulzer  centrifugal    pump   at   Mill 

118 1678 

Gilpin  County  bumping  table  681,  682 

Golden  Gate  table    681 

Gould  centrifugal  pumps  at  Mill  139 1757 

grease  tables  at  Mill  188 1921 

Griffin  centrifugal  stamp  mill 269 

mills  at  Mill  105 1636 

grinding  pans  at  Mill  130  1720 

Grondal  magnetic  separators  at  Mill  159  ...      1828 

Hallett  table 676 

Hancock  jigs  at  mills 1710,  1846,  1869,  1930 

hand  jigs 499 

Har?  jigs  at  mills 1692,  1693,  1694,  1701,  1702, 

1703,  1725,  1728,  1744,  1750,   1751,  1752,  1753, 

1767,  1772,  1773,  1774,  1775,  1829,  1837,  1854, 

1855,  1877,  1878,  1879,  1885,  1913 

Hathaway  gyratory  breakers,  table  of 1217 

Heberlimill 257 

Hendy  concentrator    683 

Hodge  and  Cleaves  sand  pumps  at  Mill  182. .   1910, 

1911 

jigs  at  mills. . .  1902,  1903,  1904,  1905,  1909,  1910, 

1911 

Hooper  air  jig 822 

Humphrey  rolls,  table  of 1235 

Huntington  mill  278,  279 

at  mills  ....  1669,  1684,  1686,  1689,  1694,  1701, 
1711,  1738,  1753,  1839,  1845,  1867,  1869 

Imlay  table    681 

Impact  screens  at  Mill  151 1803 

improved  Huntington  mills,  table  of 1312 

International  separators  at  Mill  138 1746,  1747. 

174$ 

Jeffrey  conveyors  at  Mill  126 1706 

jigs 518,  532,  553,  592 

at  mills. .  1685, 1686,  1707, 1708,  1737,  1738,  1832, 
1833,  1858,  192$ 

Johnston  vanners   1503 

at  Mill  167 1858 

Kennedy  gyratory  breakers,  table  of 1214 

Kent  roller  mill 1304 

Knowles  duplex  vacuum  pumps  at  Mill  117. .    1673 
New  Century  magnetic  separators,  table  of    1542 

triplex  pump  at  Mill  117 1674 

Krogh  centrifugal  pumps  at  Mill  173 1929 

Krom  air  jig   824 

Krupp  ball  mills  at  Mill  128   1714 

gyratory  breakers,  table  of 1215 

Linkenbach  slime  table 691 

log  washer      327 

washers  at  Mill  154 1815 

machines 1097 

McCully  breaker 44 

gyratory  breakers,  table  of    1212 

McFarlane  rolls  at  Mill  142 1766,  1767 

magnetic  separator  used  at  Monteponi 810 

May  Brothers'  jigs  at  Mill  128    1714 

mechanical  batea 683 

Monadnock  Chili  mills  at  Mill  144    1775 

mortar  jigs  at  Mill  177    1892 

movable  sieve  jig 500 

Narod  pulverizer 282 

New  Century  jigs  at  Mill  141    1760 

New  Humboldt  concentrators 1494 

Overstrom  tables  at  mills 1711,  1730,  1930 

Pape-Henneberg  dry  separator 819 

Peck  centrifugal  separator 828 

picking  belts  at  mills. .  1737,  1806,  1815,  1842,  1882, 

conveyor 490 

tables 491 

at  Mill  152 1805 

Pilling  air  hoists,  table  of   1609 

plunger  feeders  at  mills 1749,  1750,  1857 

pneumatic  belt  concentrator 818 

pumps 872 

push  conveyors  at  Mill  105 1637 

revolving  driers  at  mills 1746,  1762 

Riblet  aerial  tramway  at  Mill  124 1696 

Rittinger  table '   668 

Robins  belt  conveyors  at  mills 1750,  1805,  1806, 

1807,  1808,  1809,  1810,  1811,  1812,  1813,  1824, 

1825,  1826,  1876 

conveying  and  picking  belts  at  Mill  132  ...    1727 

Robinson  jig    504 

Rock  Emery  mills 255 

rolls 64,  86 


94 


Pages  1199-1610,  Vol.  III. 


Speed  of  rolls  and  angle  of  nip 94 

speed  curves 1224 

at  mills. .  1667,  1685,  1688,  1690,  1691,  1693,  1701, 
1707,  1710,  1714,  1716,  1720,  1724,  1727,  1737, 
1738,  1742,  1743,  1749,  1750,  1751,  1752,  1760, 
1761,  1762,  1771,  1773,  1792,  1803,  1806,  1807, 
1808,  1819,  1822,  1824,  1825,  1828,  1829,  1832, 
1833,  1837,  1838,  1843,  1844,  1851,  1857,  1858, 
1864,  1865,  1866,  1867,  1868,  1869,  1883,  1890, 
1910,  1911,  1913,  1928 

rotary  driers  at  Mill  186 1917 

rotation  for  tube  mills   1289 

round  tables  at  Mill  180 1904,  1905 

Salzburg  table 683 

sample  grinder 257 

samplers 848 

Samson  breakers,  table  of 1203 

sand  wheels 865,  866 

at  mills 1668,  1669,  1677,  1715 

Sautter  magnetic  separator 798 

scraping  conveyor  at  mills 1662,  1709 

screw  conveyors  at  Mill  105 1636,  1637 

table  of 1583 

settlers 777 

shaking  feeders  at  mills 1691,  1868,  1869 

grizzlies  at  mills 1690,  1866 

launders  at  mills 1693,  1694,  1761 

plates 741 

screens  342,  345 

at  Mill  175 1889 

Sherman  re-grinders  at  Mill  132 1728,  1729 

Siemens  and  Halske  magnetic  separator 798 

magnetic  separator 804 

simple  steam  stamp  at  Mill  182 1909 

slime  tables 684,  696 

sorting  tables  at  Mill  177    1892 

stamps  at  mills.  .1618,  1620,  1621,  1624,  1626,  1632, 
1640,  1658,  1661,  1668,  1677,  1769,  1915 

in  California 1619 

steam  stamps 126 

Stedman  disintegrator 286 

Stein,  Bilharz,  and  Luhrig  tables 670 

Sturtevant -Dodge  type  breakers,  table  of 1205 

emery  mill  at  Mill  186 1918 

mill    288 

roll  jaw  breaker 33 

rotary  breakers  at  Mill  186 1917 

Sutton,  Steele,  and   Steele  dry  tables  at   Mill 

151 1803 

take-off  belts  of  Wetherill  magnetic  separators  1524 

Traylor  centrifugal  pump  at  Mill  114 1662 

jigs  at  Mill  170 1867 

Tremain  stamp 138 

Triumph  vanners  at  Mill  101 1627 

trommel  conveyor  at  Mill  125    1700 

trommels 347,  349,  362 

at  mills 1617,  1655,  1667,  1681,  1682,  1685, 

1690,  1691,  1692,  1693,  1701,  1702,  1703,  1707, 
1710,  1714,  1724,  1725,  1727,  1728,  1737,  1738, 
1742,  1743,  1749,  1750,  1751,  1752,  1760,  1766, 
1767,  1771,  1772,  1773,  1774,  1792,  1803,  1818, 
1828,  1829,  1832,  1837,  1838,  1842,  1843,  1846, 
1853,  1854,  1855,  1857,  1864,  1866,  1867,  1869, 
1876,  1877,  1882,  1890,  1898,  1913,  1928,  1930 

effect  of 519 

tube  mills  at  mills    1632,  1770 

Tustin's  mill    262 

vanner  belts 648 

vanners 648,  653,  654,  655,  657,  658,  659 

at  mills 1686,  1687, 1778,  1780,  1930 

Vapart  disintegrator 830 

Vezin  samplers  at  mills 1691,  1701,  1742,  1748, 

1750,  1772 
vibration  of  Sutton,  Steele,  &  Steele  dry  table  1555 

Wilfley  table  deck 1465 

Waddell  Chili  mills  at  Mill  174 1886 

wash  trommels  329,  332 

pans 333 

water  current  to  move  sand  and  gravel 878 

waves  and  thickness  of  films  on  amalgamated 

plates    746 

Wenstrom  magnetic  separator    802 

Wetherill  magnetic  separator    805 

Wharton  magnetic  cobbers  at  Mill  157 1819 

wheel  agitator    780 

Wilfley  slimers     1505-1506 

at  Mill  132 1729 

tables 673,  675,  1469 

at  mills  ....  1625,  1633,  1656,  1661,  1662,  1669, 
1686,   1687,   1689,    1694,   1695,    1703,    1704, 


INDEX.  Pages  1611-2052,  Vol.  IV. 

Speed  of  Wifley  tables  at  mills  1708, 1715  1729, 1738,   1739, 
1744,    1745,    1754,    1761,    1776,    1777,    1779, 
1780,    1829,    1830,    1839,    1844,    1851,    1855, 
1858,   1867,   1868,  1870,  1894,  1929,  1940 

Woodbury-Benedict  jigs  at  Mill  177 1893 

concentrators 1 496 

at  Mill  117 1669 

Worthington  pump  at  Mill  175   1890 

proper  speeds  for  sand  wheels  of  various  diam- 
eters    1587 

Traylor  centrifugal  pumps 1589 

Sperm  oil    1097 

Sperry - 138 

E.  A.,  amalgamated  plates 745,  762,  763 

plates  for  Tremain  steam  stamps 787 

mercury  traps    774 

Sperry  vanning  buddle 2022 

Tremain  stamp 136,  139,  142 

trap  in  Cross  mill 774 

use  of  lye  on  plates  . .  • 751 

Sphalerite  and  quartz,  jig  tests  on 628 

extraction  plant  at  Mill  130 1721 

hindered-settling  test  on 617,  620 

pulsion  jig  test  on 625 

settling  velocity  of   466,  469 

specific  gravity  of   118£ 

Spider  in  amalgamating  pan 247 

Spiders  for  trommels    350,    352 

Spigots  for  classifiers 388,  404,  433,  442,  444 

jigs 507,  527 

spitzkasten 440 

Spilsbury,  E.  G.,  breakers 60 

Dodge  breaker 60 

Engis  machine 838 

jig    ,. ..     527 

riddles  versus  trommels 385 

Spindle  and  jaw  breakers,  table  of  products  of 53 

breakers    : 36 

capacity  of 52 

compared   45,  46 

comparison  with  jaw    51 

continuous  action  of 55 

cost  of 52 

details  in  the  mills    46 

distribution  of  crushing  in  the  mill 54 

fine  crushing  in  54 

friction    54 

having  greatest  movement  on  smallest  lump  36,  1207 

heads  and  concaves    47 

mill  data  on  46 

number  used   51 

power  of 52 

principle  of  action    52 

running  cost 54 

size  and  shape  of  mouth 54 

table  of  comparative  tests  of 45 

cost  of  crushing  by 50 

details  of 46 

sizing  tests  of  product  from    45 

taper   ; 52 

wear  for   '. 46 

weight  of .,.       52 

with   equal   movement   on   large    and    small 

lumps 45 

greatest  movement  on  largest  lump 45 

or  gyrating  breakers 1206 

versus  jaw  breakers  at  Mill  156 1818 

Spinel,  specific  gravity  of 1  l°i 

Spiral  screen    384 

the  Schmidt 362 

sand  pump °70 

washing  pipe  for  slime  tables 689 

Spitzgerinne 441 

Spitzkasten.     See  Pointed  Boxes. 

Spitzkasten  439 

at  mills' .' .'         .' 1777,  1778,  1878,  1879 

Richards-Shepard 1401,  1419 

Rittinger 433 

slope,  spigots,  deflectors,  etc.    440 

Spitzlutte.     See  Tubular  Classifier. 

Spitzlutte  476,  773,  1382 

Rittinger    422,  424 

Splash  board   . '. 739 

for  stamps    177 

plates 739 

Splice  for  belt    1094 

Split  shovel 1570 

for  sampling _ °44 

Spodumene,  specific  gravity  of 11°; 

Spokes  for  sand  wheels   < 

95 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Spots  on  amalgamated  plates 762 

Spray  pipe  for  trommels   358 

pipes  on  slime  tables    688 

vanners  647 

Spring  board  for  hand  jig 496,  894 

hydraulic,  and  pneumatic  stamps    1246 

pressure  on  rolls   72 

at  Mill  167 1857 

stamps 139,  141 

bibliography  for 143 

Froitzheim's     143 

timbers  for  hand  jigs 497 

steam  stamps 114,  118 

Valley  coal  dressing  plant.     L.  Gluck    2051 

Springs  for  Bradford  jig   501 

rolls  73 

on  Collom  jig 515 

Sprinkler  for  mercury 760 

Sprocket  and  chain 1096 

for  trommels 356 

Square  Deal  mine,  Wisconsin,  cost  of  hand  picking  at  1439 

measures,  equivalents  of   1187 

Squeezer,  power  amalgam 1519 

Squeezing  amalgam 781,  1517 

Stacker  for  dredges    1008,  1012 

Stackpole,  M.  D.,  slime  precipitating  agents 1416 

settlings 1419 

Stack  roasting  furnace  at  Mill  138   1747 

Stage  crushing.     J.  A.  Wauchope 2015 

Stahl,  A.  W.,  power  by  wire  ropes xx,  1174 

Stains  on  amalgamated  plates 750,  762 

See  also  Tarnish. 

Stamp  battery,  definition  of   145 

foundation  of 145 

mortar  block  of 145 

bosses,  weight  and  dimensions 186 

Dunham's  spring 141 

for  crushing  coal  an  electrically  driven   . . . 


frames 

in  the  mills 


152 
158 


Fraser  and  Chalmers 114 

head 185 

Boss 1271 

Husband 141 

Krause's  pneumatic    141 

mill,  adjustments  of  the.     C.  De  Kalb 2011 

appliances,  some  accessory.     G.  A.  Swart  . . .  2031 

bolts  for  holding  down  mortar  in 150 

California  144 

experiences.     A.  Del  Mar 2049 

experiments      2011 

for  testing 1137 

practice.     C.  De  Kalb 2048 

notes  on    2035 

in  South  Africa 221 

pulp,  sizing  test  and  analyses  of    303 

records.     E.  P.  Brown 2048 

tests 1165 

waste,  recovery  of 266 

with  gravity  stamp  and  canvas  table 1038 

wooden 2011,  2012 

milling,  California  versus  Colorado 1030 

discussion  of.     D.  Harmon 2012 

in  California,  cost  of.     A.  Del  Mar    2045 

of  free  gold  ores.     D.  Harmenn 2047 

some  suggestions  on 2046 

mills 1013 

bibliography  for 1173 

classifiers  in 658 

cost  of  milling 1131,  1132 

cross  sills  in 153 

description  of  two  new 2036 

feeding  of  water  to.     B.  McDonald    2044 

gravity,  forms  of  frames  for   156 

guides  in 155 

timbers    155 

improvements  in.     C.  C.  Christensen 2011 

mud  sills  for 152 

platforms  for   156 

posts  for 153 

using  plates,  vanners,  and  canvas  or  blanket 

tables 1029 

with  plates  and  vanners 1018 

without  amalgamated  plates 1014 

Morison's  high  speed  141 

Patterson  Elephant 141 

Phoenix  atmospheric 140 

portable  prospectors 2011 

pulp  consistency  of 413 

Rapid  Economy 1261,  1278 


96 


Stamp  shaft,  pulley,  and  guides 128 

shoes  and  dies  182 

Sholl 141 

stems     187 

for  grizzly  bars    338 

table  of  details  of  187 

tapers  of 187 

Stamping,  high  speed 2011 

in  cyanide  solutions  at  Mill  102 1630 

mills 1645,  1651,  1668,  1679 

S.  Africa,  coarse   2012 

Stamps.     See  Steam,  Gravity,  Pneumatic,  Spring. 

advantages  of.     A.  Del  Mar 2013 

and  mortars,  table  of  weights  of 164 

arrangement  of    1 108 

at  the  Simmer  Deep,  heavy    2013 

capacity  of 130 

comparative  work  of  gravity  stamps  and  Hunt- 

ington  mills    1262 

Nordberg  single  cylinder  and  compound 

steam  stamps 1254 

comparison  of 134,  2012 

Denny  hydraulic 1257 

details  of  steam  cylinders,  water  used  and  capac- 
ity      126 

die,  ring,  staves,  and  shoes  for 120 

discharge 129 

duty  of   2013 

efficiency  of  steam  and  gravity  compared 134 

feed  for 1224 

floors,  bins,  and  feeding  arrangements 128 

for  crushing  lime  at  Mill  106 1416 

foundation,  mortar  beds,  and  sills  and  girders. .  114 

frame  of   118 

gravity.     See  Gravity  Stamps. 

gravity 113,  144,  1246 

at  mills 1640,  1658,  1769,  1915 

Boss  cam  key  for    1273 

cantilever  frame  for   1272 

head  for    1271 

lever-operated  finger,  for 1273 

wedge-grip  tappet  for 1272 

cams  for 1272 

Canda  cams  for 1273 

economic  range  of 1276 

Foote  screen  for    1270 

guide  blocks  for 1267 

heavy  stamps  at  Mill  107   1645 

in  South  African  practice    1643 

Krupp  cam  shaft  for    1272 

life  of  shoes  and  dies 1277 

materials  for  wearing  parts  of    1277 

mortars  1263 

order  of  drop  for 1274 

Pachuca  stamp  battery    1272 

power  for   1274 

principle  of    113 

and  purpose  of    1262 

proportions  between  weights  of  parts   1272 

sectional  guides  for    1268 

heavy 2013 

at  Simmer  Deep   2011 

hydraulic 1257 

pneumatic,  and  spring 1246 

Krause  pneumatic 141 

lever  1246,  1261 

Rapid  Economy 1261 

mortar  and  screens  for 119 

Nissen,  at  Boston  Consolidated 1278 

Home  Run  mill 1264 

Mill  165  1851 

gravity 1263 

Nordberg  single-cylinder  steam  stamp   ....  1247,  1249 

stamp  single-cylinder,   indicator  diagram.  1250, 

1251 
tandem-compound  steam  stamp  at  Tamarack 

and  Osceola  mills 1254 

on  the  Rand,  heavy   2012 

piston,   piston  rod,  dash  pot,   flange,  revolving 
pulley,  stamp  stem,  stamp  shoe  of  Nordberg 

steam  stamp 1247 

pneumatic 1257 

and  spring 113,  139 

principle  of 113 

See  Pneumatic  and  Spring  stamps. 

steam,  and  gravity    224 

power  and  efficiency  of    131 

principle,  purpose  and  classification 113 

ring   120 

safety  devices    127 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Stamps,  screen  for 120 

shaft,  pulley,  and  guides 128 

shoes 120 

sizing  tests  on    315 

small  steam    136 

spring    141 

staves 120 

steam.     See  Steam  Stamps. 

steam 113 

cross-compound 1250 

discharges  for 1256 

foundations,  anvil  blocks,  mortar  beds,  sills, 

and  girders  of  Nordberg  steam  stamp 1247 

indicator  diagrams  of  tandem  or  steeple-com- 
pound     1255 

Krause  mortar  discharge  for 1256 

mortar  jig  discharge  for 1256 

Nordberg  steeple-compound  at  Mill  181    ....  1254 

pneumatic  and  spring 113 

principles  of  action 1246 

single-cylinder  at  Mill  182 1254 

sizing  test  on  Butte  ore  crushed  by 135 

steam    cylinder,   valves,   and   valve  gears   of 

Nordberg  steam  stamps 1249 

table  of  efficiency  of 133 

tandem  or  steeple-compound    1250 

use  of  and  quality  of  work  of 134 

table  of  details  for  screens 121 

of  valve  action 127 

foundations  and  mortar  beds   118 

sills  and  girders  for 118 

tests  on  work  required  for 306 

their  principle,  purpose,  and  classification. . .  113, 1246 

Traylor  gravity   1278 

velocity  of  fall  in 315 

versus  ball  mills,  as  slime  makers  at  Mill  185  . .  1916 

Bryan  mill   273 

Griffin  mill    284 

rolls 224,   314 

weight  of  and  effectiveness  of  blow 218 

weights  and  duty  of 2013 

Wellman,  Seaver,  Morgan  gravity    1278 

Stand  pipes    1106 

for  Tamarack  classifier    397 

Standard  Consolidated  mill 228 

amalgamated  plates  in 766 

mine,  Frenier  sand  pumps  at     1588 

Iron  Works,  Lane  slow-speed  mill    1308 

machines 1097 

mill    1183 

Idaho,  milling  at  the.     J.  R.  Finlay 2033 

mine,  tube  mill  lining  at  the 

Bodie,  Cal.,  slope  of  launder  at 1549 

Mining  Co.,  mill 947 

ten-stamp  battery   1267 

Standardization  of  laboratory  screens.     W.  S.  Hutch- 

ioson 1366 

screens    1361 

A.  Whitby    2019 

report  of  committee  on    2019 

Standards,  metallurgical.  F.  T.  Snyder     2019 

Stanford,  C.  P 228 

Stanwood  gravity  muller 1279,  1285 

Stapff,  F.  M.,  Stapff  jig  642,  643 

Star  Canon,  Nevada,  Krom  jig  at 824 

of  the  East  mill,  amalgamated  plates  in 745 

Ballarat,  acid  water  173 

mercury  wells  in 769,    771 

Starch,  settling  of, 880 

Starr,  G.  W.  Empire  gold  stamp  mill  at  Grass  Val- 
ley       ...    1184 

Stationary  picking  tables 488 

screens  336,  1345 

for  dredges 1012 

Staurolite,  specific  gravity  of 1189 

Stausatz    214 

Staves,  details  of,  from  mills 123 

for  steam  stamps 120 

Stay  battery 224 

for  stamps    214 

box  for  jigs 551 

boxes  for  jig  discharges 584 

overflow  mortar,  Schorr 1266 

Steam  cylinder  for  steam  stamps 122 

of  Nordberg  steam  stamps    1249 

for  heating 1098 

power    1091 

hammers 12 

jacket  for  amalgamating  pan   243 

jig   519 


Steam  pipe  for  amalgamating  pan 243 

pipes  for  drying 882 

power  in  mills.     See  Individual  Mills  in  Chapter  XX. 

power  for  mills    1089 

pressure  in  mills    1090 

on  steam  stamps     126 

Pumps 871 

separator 1091 

stamp,  Allis..ll4,  116,  118,  119,  120,  121,  122,  123, 
124,  125,  126,  127,  128,  131,  133 

area  of  discharge 129 

Ball. .  114, 118,  119,  120,  121,  122,  123, 124  126  127 
128,  130,  131,  132,  133,  134 

Cuyahoga.,114,  118,  119,  121,  122,  123,  126,  127, 

128,  133 

Fisher's 142 

Fraser  &  Chalmers. .  114,  116,  118,  119,  120,  121, 
122,  123,  126,  127,  128,  131,  133 

indicator  bell 129 

laboratory 2011 

Leavitt.,114,  115,  116,  118,  119,  120,  121,  122,  123, 
124,  126,  127,  128,  131,  132,  133,  134 

linings     120 

mills  in  Montana    984 

at  Lake  Superior 990 

mortar  discharges 993 

Nordberg   997,    1247 

foundations,  anvil  blocks,  mortar  beds,  sills, 

and  girders     1247 

single-cylinder  stamp 1249 

steeple-compound  at  Mill  181 1254 

tandem  compound  at  Tamarack  and  Osce- 

ola  mills   1254 

prospector's 2011 

screens,  material,  size,  life,  etc 121 

shaft,  pulley,  and  guides 128 

Sharpneck 136 

Tremain 136 

Union  Iron  Works..  11 4,   117,   118,   119,   122,  123, 

126,  127,  128 

Wilson's    142,  143 

Wood 136 

stamps 224 

action  of 113 

at  mills. . . .  1892,  1895,  1897,  1899,  1901,  1906,  1909 

bibliography  for 142 

capacity  of 130 

cards  of 131 

clean-up  134 

comparative  performance  of  Nordberg  single- 
cylinder  and  compound  stamps   1254 

cost  of  crushing  by 134 

cross-compound 1250 

cylinder  clearance 123 

dash  pot  on 127 

die,  ring,  staves,  and  shoes 120 

different  makes  of 2011 

discharge  of     129,    1256 

efficiency  of    131 

energy,  momentum,  and  efficiency 133 

floors,  bins,  and  feeding 128 

foundation,  mortar  beds,  sills,  and  girders  ...     114 

frame 118 

history  of    2011 

indicator  diagrams  of  single-cylinder   Nord- 
berg   1250,    1251 

tandem  or  steeple-compound    1255 

Krause  discharge  1003,  1256 

Leavitt  differential  cylinder 124 

mortar  and  screens 119 

housing 119,    120 

jig  discharge  for   1256 

on  gold  ores 135 

piston,  stroke,  speed,  water,  capacity   126 

piston  rod,  dash  pot,  flange,  revolving  pulley, 

stamp  stem,  stamp  shoe 1247 

power  for   131 

principle  of 113 

action    1246 

rubber  cushion  for   116,    127 

safety  devices 127 

screen  frame 120 

single-cylinder  at  Mill  182 1254 

sizing  tests   135 

small   136 

spring  timbers  for 114,    118 

steam  cylinder,  valve,  and  valve  motion 122 

tandem  or  steeple-compound    1250 

tests  on  1261 

at  Mill  182...  .   1909 


97 


1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Steam  stamps,  types  of 114 

used  for  malleable  minerals    314 

uses  and  sizing  tests 134 

valve  and  valve  gears  of  Nordberg  steam  stamps  1249 

versus  gravity  stamps 134 

rolls  at  Mill  179     1900 

water  used   129 

wearing  parts     121 

weights,  life,  etc.,  of  shoes,  dies,  rings,  staves     122 

used  for  heating  water  for  amalgamation 768 

versus  electricity  as  a  motive  power    1927 

Steams-Roger    Manufacturing    Company,  hoe  con- 
veyor at  Mill  141    1762 

Mill  152  1807 

roll  speeds    87 

scraping  conveyor 1662 

Wetherill  magnetic  separator    1521 

Stedman's  disintegrator 236,   284 

bibliography  for 298 

capacity  for  clay 286 

fertilizers 286 

of,  at  Eagle,  West  Virginia 285 

Steel  cloth  screens .__ 173 

consumption  of  shoes  and  dies  at  Mill  117 1668 

for  jig  screens    545 

roll  shells 68 

springs 73 

shoes  and  dies    182,  183,  184 

steam  stamp  wearing  parts 122 

frame  for  mills 1088 

log  washer   325 

McLanahan's 325 

plate  screens 173 

receiving  bins  at  Mill  174 1882 

scraper  for  amalgamated  plates 758,  762 

specific  gravity  of  1189 

versus  brass  for  jig  screens  547 

Steep  end-shake  vanner 1165 

Steeple-compound  or  tandem  steam  stamps 1250 

indicator  diagrams    1255 

steam  stamp  at  mills 1254,  1895,  1899,  1901 

Stefan,  H.,  Bryan  mill 296 

mill    1177 

Stein  table       669,  698 

Steinenbruck,  mill  at   1176 

Rittinger  tables  at 668 

Stem  for  gravity  stamps 187 

guides  at  Mill  96 1618 

Stem  Winder  Mill xxvi,  951 

Stems,  fatigue  of  stamp 2012 

of  Nordberg  steam  stamps   1249 

removal  of  broken  stamp 2011 

Stephanite,  specific  gravity  of . .    1189 

Stephen  Lavagnino's  arrastras xxviii,  1039 

Stephens-Adamson    Manufacturing    Company,   belt 

conveyors  at  Mill  171  1868,  1869 

elevator  buckets  at  Mill  126 1707 

self-oiling  carrier  for  conveyor  belt   1585 

tripper  for  discharging  conveyor  belts    . .    1586 

Vibracone  separator 1352,    1360 

Step  roller  crusher  mill    2017 

Steps  on  slime  tables   689 

Steptoe  Valley  Smelting  and  Mining  Company  .  .1852,  1865 
Mill  Ely,  Nevada.    W.  R.  Ingalls  . .   2039 

Sterling  Iron  &  Zinc  Co.,  mill 1060 

magnetic  separation   837 

Sterrett,  D.  B.,  monazite  sand  dressing  in  the  Caro- 

linas 2030 

Stetefeldt,  C.  A.,  gravity  crushers   229 

stamps 226 

versus  Krom  rolls 110,  112,  224 

leaching  silver  with  hyposulphite 1174 

lixiviation 1167 

of  silver  ores    xx 

rolls 109,  111 

Stewart  jig  in  coal  washing 2022 

system  of  coal  washing.     D.  T.  Blakey 2051 

Stewart's  mill,  wear  of  amalgamating  pans 249 

Stibnite,  specific  gravity  of     1189 

Stickles  mill  of  the  Utica  Company xxviii,  1034 

Sticks,  removal  of     882 

Stilbite,  specific  gravity  of 1189 

Stiles  pulverizer 228 

Stirling  boilers 994 

Stirring  arms  in  trough  washers 320 

in  settling  fine  slimes 1148 

Stirrup  feeder 854 

Stock  house  for  ore 843,  1108 

Stock,  H.  H.,  concentration  of  Mesabi  ores 1344 

Stokes,  G.  G.,  law  of  viscous  resistance 1423 


Stokes,  G.  G.,  velocity  of  a  sphere  falling  through 

a  viscous  liquid 1433 

R.,  asbestos  milling  in  Canada 2046 

Britannia  Copper  Co.  mill,  B.  C 2046 

Coniagas  mill,  Cobalt,  Ontario    2046 

diamond  washing  in  Africa     2046 

milling  at  Broken  Hill  2046 

Rossland  district,  B.  C 2046 

St.  Eugene  mill,  B.  C 2046 

mill  practice  in  Australia 2046 

tin  industry  of  Tasmania 2046 

washing  in  the  Malays 2048 

tube  milling  in  New  Zealand   2014 

Stolberg,  jig  eccentrics  at 532 

Stone,  compressive  strength  of   300 

effect  of  heat  on  strength 302 

riffles  721 

tests  on  at  Watertown  arsenal    300 

Stoppages  in  mills 1115 

Storage  bins 843 

tanks  for  water   1106 

Storehouse  for  mill  1088 

Storing  concentrates  1112 

Storms,  W.  H.,  California  gold  mills    1179 

canvas  tables 729 

gold  stamp  mills  in  California   1181 

Story  in  mill  building 1086 

Stoves  for  heating 1099 

Stowlinski,  F.  de,  concentrating  mill,  San  Antonio  de 

Yguana,  Mexico   1180 

Strainer  for  classifiers 388 

water 858 

Strakes    725 

Strainer  for  amalgam 781 

Strands  in  wire  rope 1095 

Strength  of  cubes  and  prisms,  tested  at  Berlin 302 

machines 1096 

rock,  effect  of,  on  power  used    313 

stone 300,  315 

before  and  after  heating,  tested  at  Berlin     302 
parallel     and    perpendicular     to     bedding 

planes 302 

Stresses  in  machines 1099 

Stretch  of  belt 1094 

Strips 1082 

Stroh's  jig 642 

Stroke  of  jigs 553,    594 

movable  sieve  jig 500 

steam  stamps 126 

on  Wilfley  table 673,  675 

See  also  Throw. 

Strokes,  number  of,  in  jigs 592 

Strontianite,  specific  gravity  of    1189 

Strontium,  atomic  weight  of 1188 

Stroud,  E.  H.  and  Company,  disintegrator  and  pul- 
verizer      1319 

mill    1281,  1319 

tables  of  sizes,  capacities,  power,  etc.,  of  the  1320, 

1321 

Structure  and  fracture  of  minerals 3 

Stubbs  wire  gauge H9< 

screen  gauge 172 

Studying  mills,  method  of 1613 

Stuff  treated  by  pans,  table  of  size  of 248 

Stuhl,  L.,  Mumford  and  Moodie  machine 839 

Stupakoff,  S.  H.,  on  wire  gauges 2019 

Sturm,  Friedrich,  separation  processes 839 

Sturtevant,  bag  houses 883 

balanced  rolls,  description  of 1232 

table  of  sizes,  power,  weights,  dimensions, 

etc 1234 

B.  F.,  Co.,  heating  apparatus 1099 

breaker 1223 

diagram  of 

for  testing 1137 

centrifugal  rolls   2010 

description  of 1237 

Dodge-type  breaker    1205 

fan  at  Mill  105   1636 

horizontal  emery  mill  at  Mill  186 1913 

Mill  Company,  rolls 1245 

rock  emery  mill 253 

sample  grinders 1 284 

Sturtevant  breaker   1223 

mill  110,236,286 

bibliography  for 298 

details  of 388 

versus  rolls  

roll  jaw  breaker 32,  36,  2009 

data  of  sizes 33 


98 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Sturtevant  roll  jaw  Blake  breakers 1205 

rolls  2010 

at  Mill  178 1896 

182 1910 

roll  shell  turning  device,  the 1243 

rotary  breaker  at  Mill  186    1917 

sample  grinder 1279,  1284 

toggle  separator 2018 

Stutz  coal  jig 523 

mechanism  537 

improvements  on  coal  jigs 640 

jig    538 

ribbon  theory  of  roll  capacity 101 

S.,  link  belt  elevators  and  conveyors 884 

rolls  for  coal 109 

water  separation    640 

Style  "  K,"  Gates'  breakers 1207 

Submerged  trommels  at  mills 1356,  1703,  1726 

Suckling's  double  discharge  mortar 227 

Suction 889-891,  1611 

and  pulsion  in  jigging    1460 

after  sorting 891 

firing's  tests  on  suction  jig 1461 

cleaners  at  Mill  186 1918 

dredge 1009 

effect  of 628 

fans,  for  dust 883 

final  conclusions  on    631 

general  principles  of 627,  1461 

how  avoided  in  jigs 538 

in  jigs 494,  627 

Hoppe's  tests   630 

investigated  in  the  mills 632 

theory  of 1462 

use  made  of,  in  mills 889 

Sudbury,  breakers  at 57 

Suisse,  Mathet,  De  Gournay  and    Hochstrate  appa- 
ratus    837 

Sulphide  Corporation  at  Mill  130 1719 

separated  by  oil 831 

Sulphides,  effect  of,  on  amalgamated  plates 749 

Sulphur,  atomic  weight  of   1188 

from  coal  by  crushing,  removal  of.     C.   C.   Up- 

ham 2049 

Mines  Company  mill 900,  905 

Mines  and  Railroad  Company 1116 

mill 905 

Virginia,  mill  at 905 

ore,  mill  for 904,  905 

specific  gravity  of  1 189 

Sulphurets  treatment  of 781 

Sulphuric  acid  for  leaching 1167 

in  settling  tests    1147 

used  on  plates 751,  752 

Summary  of  devices  used  on  revolving  convex  tables  689 

grizzlies  and  gravel  screens 339 

principles    889 

of  ore  dressing 161 1 

Summerhayes  vanner  belt  647 

Summit  County  ore,  Colorado,  concentration  of.     D. 

H.  Laurence 2043 

Mining  Co.,  results  with  Wilfley  table   674 

Superior  crushing  rolls,  description  of 1231 

rolls  at  Mill  167    1232,  1857 

Supplementary  principles  in  concentration 5 

Surface  current  box  classifiers 433,  477,  1401 

details  of  in  the  mills 442 

in  the  mills 440 

method    of    investigating    laws  of    free 

settling  particles  in  434 

expenses   1123 

for  slime  tables    684,  695 

of  slime  tables 688 

produced  in  crushing 310 

relation  of  to  diameter  of  ore  particle    305 

sizi  ng  on,  used  in  mills 889 

tables 685 

continuous    686 

intermittent    700 

tension,  relation  to  slime  question 1414 

theory  of  crushing  work 305 

units  of 1187 

Suspended  frame  vanners,  Allis-Chalmers 1503 

Johnston 1501 

sowing  or  picking  table,  Krupp-type 1436 

Sutter  Creek,  California,  mill  at    1023,  1184 

Sutton,  Steele  and  Steele,  dialectric  separator 1766 

at  Mill  151 1804 

electrostatk  separator 1611 

pneumatic  dry  tables   1479,  1554 


Sutton,   Steele  and   Steele  pneumatic  dry  tables  at 

mills 1765,  1803,  1804 

vibrometer  ore  sizer  at  Mill  151 1803,    1804 

Sutton-Steele  dry  table,  description    of  the.     R.  C. 

Canby 2027 

electrostatic  separator,    description    of    the      2027 

process.     R.  C.  Canby 1568 

Svarto,  Sweden,  magnetic  concentration  at   835,    836 

separation  at   834 

mill  at 1185 

phosphate  made  at  815 

Swain  hydraulic  classifier,  the 1371,  1420 

Swart,  W.  G.,  a  good  article  on  electrostatic  separa- 
tion       2027 

Sweating  plates  for  amalgam   759 

Sweden,  Elmore  vacuum  oil  process  in    1560 

jigs  in  640 

magnetic  concentration  in 835 

mills  in 911,  1175,  1179 

Wenstrom  magnets  in    801 

Sweeney,  J.  M.,  riffles  721,   729 

Sweeny  mill,  sampling  cabinet  used  at 1570 

Sweeping  table 703 

Sweeps  for  buddies     705,  706 

Sweetser,  R.  H viii 

Swinburne,  theory  of  flotation  processes 1555,    1556 

Swinging  conveyors  at  Mill  168 1862 

plates 742 

Switches  in  launders 873 

Syenite,  weight  of 1190 

Sylvanite,  specific  gravity  of 1189 

System,  continuous  or  Boss,  of  working  amalgama- 
ting pans 248 

intermittent  or  tank  of  working  amalgamating 

pans 248 

of  screening,  the  Heberli 364 

Neuerberg 364 

Systems  of  trommels 364 


Table,  automatic  blanket.     T.  White 2022 

Bartlett 678 

Bartsch  circular  bumping   691 

Brunton  belt    698 

Cammett 676 

Castelnau  698 

Clark 689 

department  at  mills    1785,    1841 

Dodd 675 

Ellenbecker 681 

Evans   689 

Ferraris  belt 698 

for  settling  starch  880 

testing 1153,  1154,  1155 

German  sweeping 703 

Gilpin  County  bumping 680 

glass,  for  film-sizing  tests    707 

Golden  Gate    681 

Hallett 675 

Hendy  concentrator   683 

Imlay 681 

Linkenbach  slime   689 

of  diameters  and  areas  of  circles 2000,  2001,  2002, 

2003 

velocities  of  quartz  grains. . . .  2003,  2004,  2005, 

2006 

effect  of  distance  hauled  upon  settlement  in 
wagon 2007 

voids  in  crushed  limestone    2006 

Overstrom    679 

Parsons 668 

revolving  circular  concave  slime    692 

Rittinger 667 

Roberts  slime 691 

rocking 320,  1032 

Salzburg 682 

Schranz 689,    728 

Sparre  circular  oscillating   691 

top,  paint  for 1483 

Uren  belt    698 

with  riffles    770 

Wilfley 670 

Woodbury 676 

Tables.     See  also  Buddies,  Table,  and  Slime  Tables. 

Allis-Chalmers  annular  picking  table    1435 

and  belts  for  hand  picking  1435 

speed  and  capacity  of 1438 

belt    669,    697 

bibliography  for 727 


99 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1 197,  Vol.11. 


Tables,  blanket   703,  1464,  1507 

building  type 704 

bumping 1497 

and  jerking 667 

canvas 700,  1035,  1464,  1507 

carpet  and  blanket 703 

carpet   703,  1035,  1464,  1507 

classification  of  Wilfley  group 1465 

cocoa  matting    '  702 

concentrating,  Bartlett  Simplex  concentrator 1487 

Bartsch  rotary  percussion  table 1497 

belt-percussion  table 1496 

capacity  of  Wilfley  table    1469 

Card  concentrator 1481 

Christensen  concentrator 1484 

cleaned-ore  plane  in 1465 

cleaning  plane  in 1465 

deck  of  Wilfley    1467 

Deister  concentrators 1488 

Dodd  buddle 1481 

elevator  or  raff  wheel  for  Wilfley  table 1468 

feed  box  for  Wilfley  table 1468 

Ferraris 1490 

foundation  for  Wilfley  table 1465 

general  comments  on 1498 

head  motion  for  Wilfley  table    1466 

height  of  riffle  cleats  for  Wilfley  table 1468 

investigation  of  Wilfley  table  work    1469 

James  table   1490 

slimer    1491 

linoleum  for  deck  cover 1467 

Luhrig-Buss  concentrating  table    1492 

slimer    1496 

McLeod  concentrating  table 1492 

new  Humboldt  concentrator  1493 

new  Standard  concentrator 1478 

operating  conditions  for  Wilfley  table 1469 

Overstrom  table 1479,  1485 

Finder  concentrator 1479 

riffle  cleats  for  Wilfley  tables   1467 

roughing  plane  in  1465 

"setting  up"  and  "leveling  up"  Wilfley  tables  1468 

sized  versus  classified  feed  for    1478 

speeds  for  Wilfley  table   1469 

Sutton,  Steele  &  Steele  dry  table 1479,  1544 

tilting-frame  for  Wilfley  table 1457 

wash  water  for  Wilfley  table 1469 

Wilfley 1465 

table  as  a  slimer 1478 

Woodbury  table    '. 1494 

continuous -surf  ace  round  tables 1506 

Cornish  frames   704 

end-bump    680,  1464 

film-sizing    685,  1506 

fixed  circular  convex  slime    689 

for  amalgamated  plates 733 

dredges 1012 

picking    488 

greased   831 

Humboldt  picking 1437 

intermittent  surface  type 700 

investigation  of  film  sizing 707 

of  equivalents 1 187 

principle  of 644 

concentrating.     C.  W.  Comstock 2023 

principles  of  action  of  Wilfley  group 1465 

revolving  circular  convex  slime 686 

strakes 725 

Salzburg 1115 

shaking  amalgamating  tables  in  South  Africa  . .  1513 

side-bump 667 

slime   684 

Stein,  Corning,  Bilharz,  and  Luhrig 669 

tye 707 

versus  jigs 606,    641 

Wilfley  group 1464 

Taft  breaker 61 

Tailboard  for  jigs   510,  525,  550 

height  of 550 

Tail-discharges  for  jigs 581 

Tailings  and  sludge  mills  of  Joplin,  Missouri 2042 

Tailings  at  Broken  Hill,  disposal  of 2032 

Kalgoorlie,  disposal  of 2032 

the  Arizona  Copper  Co.,  disposal  of 2032 

definition  of  494 

disposal  of   1113 

for  future  use,  storage  of.     H.  F.  Durant   2032 

handled  by  mechanical  shoveler 879 

launders   873 

of  vanners,  testing  of 1 171 


Tailings  plant  at  Kellogg,  Idaho    2043 

for  tin  ores 1082 

of  Calumet  &  Hecla  Mining  Co.,  Michigan  . .  2046 

Mill  177  1894 

preservation  of 1114 

removal  of,  from  jigs 587 

reservoirs    460 

re-treatment  plant  at  Mill  130 1723 

sampler 848 

sampling  of    845 

sand  and  slimes  in  the  Witwatersrand,  handling 

of.     H.  R.  Skinner 2047 

sizes  of,  in  mills    1116 

treatment  of    1110,  2048 

at  Tintic,  Utah, 2036 

used  for  filling 925 

value  of 1114 

weight  of 1191 

wheels 864 

data  on.     Julian  &  Smart   1610 

mechanical  efficiency  of 1609 

spokeless.     L.  H.  Lavenstein 2032 

versus  pumps  in  Witwatersrand 1645 

Take-off  belts  of  Wetherill  separator,  width,  thickness, 

and  proper  speed 1524 

Talc,  angle  of  nip  required  to  crush 94 

effect  on  mercury    751 

grinding  mill.     J.  N.  Nevins  2014 

ground  in  buhrstone  mill     253 

specific  gravity  of   1 189 

Tallow 1097 

for  belts    1093 

Tamarack  clasifier 397 

mill,  Burgan  classifier  at 1371 

Nordberg  tandem-compound  stamps  at 1254 

rigid  rolls  at 1237 

Mining  Company  mill xxvii,  1000,  1181 

Tandem-compound  steam  stamps 1250 

at  Tamarack  and  Osceola  mills 1254 

indicator  diagrams    1255 

trommels 362 

Tank  for  constant  head 858 

washing  with  hand  picking 488 

house  at  Mill  161 1840 

system  of  working  amalgamating  pans 248 

Tanks,  Callow 2020 

distributing 449 

for  water 1106 

settling    450 

Tantalum,  atomic  weight  of 1188 

Taper  of  breakers  52 

stamp  stems 187,  188 

Tappan  pump 1046 

Tappets  for  gravity  stamps 188 

the  Boss  wedge-grip 1272 

resetting   201 

screw  type    189 

table  of  dimensions  of   189 

Tarasca   Gold    Mining    Company,    Finder   concen- 
trators at 1481 

Tarnishing  of  amalgamated  plates 749 

Tarnowitz,  Biittgenbach's  separator  at 447 

Heberli  mill  at 292 

settling  reservoir  at 461 

tanks  at 479 

Silesia,  mill  at 1186 

specific  gravity  test  at    1159 

stamps  at   230 

Tasmania,  costs  of  producing  copper  at 1957,  1958 

mill  in 1183 

tallow  for  guides  in 156 

tin  milling  in 1083 

mines,  stamps    225 

Tatum,  L.  W.,  amalgamating  pans 291 

Taylor  and  Brunton  horizontal  riffle  sampler 1577 

riffle  for  cutting  down  ground  pulp 1578 

F.  W.,  belts 1093,  1094,  1176 

hand  breaker 59,  1137 

Iron  &  Steel  Co.,  manganese  steel 68 

J.   &  Co.,  stamp  mill     ^ 1137 

mine  of  Idlewild  Gold  Mining  Company,  mill  . .  xxvii 

mine,  mill  at 1021 

pipe  sampler  used  by 845 

portable  stamp  mill    2012 

Richard,  revolving  knife  buddle 335 

W.  W.,  sampling    884,  885 

Tays,  E.  A.  H.,  Bryan  mill 273 

comments  on  Binkley  slime-settling  system.  141Q 

slime  settlings    1419 

Teague  on  kieves    72? 


100 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


1170, 

.'.'.'.'.'.'.'.'.'.'.".'.'.'.'.'.'  11 36, 


Tecolotes  mill    

Telluride,  Colorado,  mill  at 1014,  1016, 

milling  practice  at 

gold  

ore,  cost  of  producing  gold  from 

tests  on  

Tellurium,  atomic  weight  of 

Temperature,  effect  of  on  amalgamation.  .766,  1516, 

at  Homestake.     T.  J.  Grier  

settling  slimes 1149, 

straining  amalgam    

of  heating  for  decrepitation 

oil  separation 

pan  amalgamation    

roasting  for  magnetism    

regulated  by  pyrometer  in  Wilfley  roasting  fur- 
nace   

Template  for  stamp  cams  

Templates 

Templeton  roller  feeder 

for  gravity  stamps 

Tenacity,  affecting  separation 

and  brittleness,  effect  of  in  dressing  ores 

Tendency  of  ore  dressing    

Tennessee  Copper  Company,  cost  of  producing  cop- 
per at 1956, 

Tenorite,  specific  gravity  of    

Tension  in  belts    

Tenth  U.  S.  Census,  order  of  drop  of  stamps 

Tephroite,  specific  gravity  of 

Terbium,  atomic  weight  of 

Terraced  mill  site 

Terry,  G.,  pigments,  paint  and  painting    

washing  china  clay 

Test,  directions    for   carrying   out   a    concentration. 

J.  P.  Porter 

in   Platteville,  Wisconsin,  results  of  a   mill.     B. 

Hodge 

jigging 

of  gold  ore 

lubricants 

mill  machines 

specific  gravity 

Testing 

a  Frue  vanner 

Bardwell  sorting  tube  . 

bibliography  for 

by  bottle  amalgamation 

heavy  solutions    1 156, 

oil 

classifiers 

suited  for    

for  a  process    1161, 

flotation 

Delprat  and  Potter  processes    

Elmore  process    

Van  Meter  process 1991,  1992, 

Jigs  ..•••• 

suited  for    

magnetic  separators  suited  for   

magnets,  double-pole 

Wetherill  separators 

of  black  sand.     W.  Fawcett  

gold  mill  tailings.     W.  E.  Darrow 

ores.     H.  Van  F.  Furman 

mill 

ore  from  mine 

ores.     M.  Lenicque    

plant  at  Denver.     G.  R.  Delamater 

T.  Tonge   

Mill  141    

of  H.  E.  Woods.     A.  Lakes 

the  California  Ore  Testing  Company 

roasting  for  magnetic  separation    

screens  suited  for    

under  water 

wire  versus  plate  

tools  for    

Wilfley  table  suited  for    

Tests,  amalgamation 

at  the  Homestake  mill  in  1897.     A.  J.  Clark  . . 

firing's  test  on  suction  jig 

by  Elmore  vacuum  oil  process   1559, 

hand  picking    

compared  with  mill  work 

fourteen-day  test  of  Richards'  pulsator  classifier 

at  Mill  162 

hand  concentration.     W.  McDermott 

sorting,  at  Mill  162 

metallurgical    


1748        Tests  of  American  Process  Company  drier  . .  .    1599 

1176  breakers   59 

1925  Callow  cone  on  Butte  copper  slimes 1404 

1014  classifier  jig  at  Mill  120 1452 

1974  Deister  concentrator  at  Mill  101    1489 

1175  feed  and  discharge  of  Abbe  tube  mill                  1290 

1188  finished  products  of  tube  mill .    1290 

1640  Gates  and  McCully  breakers    45 

2024  grains  in  free  settling  '.     465 

1848  Grill  drier  at  plant  of  Empire  Portland  Cement 

781  Company    1597 

829  Hancock  jig  on  Montana  sulphide  copper  ore   1442 

831  hindered  settling 1428 

248  by  pulsion  jig 623 

814  McLeod,  Wilfley  and  Overstrom  tables  at 

Mill  162   1493 

1548  mill  work   35 

193  oil  concentration  at  Mill  172    1874 

1097  ores  on  Wetherill  magnetic  separators    808 

854  power  at  Mill  173 1927 

199  Richards'  pulsator  jig 1456 

891  roasting  pyrite  for  magnetism 1544 

2  simple  Allis-Chalmers    type   steam   stamp   at 

1119  Mill  182   ...    1909 

single-cylinder  steam  stamp  at  Mill  182 1254 

1957  steeple  compound  steam  stamp  at  Mill  181  . .    1254 

1189  Sutton   Steele  &  Steele  dry  table 1555 

1093  telluride  gold  ores  separation  by  crushing  and 

215  screening 1566,  1567 

1189  trommel  products  at  Iron  Mountain,  Missouri  384 

1188  Woodbury  jig  at  Mill  162  1449,  1450,  1451 

1085  work  of  classifiers 461 

xx  on  absorption  of  gold  by  plates 765 

1174  British  Columbia  ores,  flotation 2048 

compressive  strength  of  stone !...-....  300 

2048  film  sizing 707 

Haverstraw  sandstone  at  Watertown  Arsenal. .  300 
2048  hindered  settling 610 

1165  insterstitial  currents    626 

1166  jigging  mixed  sizes 630 

1098  Nordberg  steam  stamps 1261 

1171  sands,  regrinding.     C.  Butters 2014 

1159  smooth  and  corrugated  vanners 650 

1988  stone  at  Berlin 301 

1171  Munich 301 

1988  strength  of  rock .     311 

1173  suction  in  jigs 627,  630 

1996  vanners  664,  666 

1993  place  and  value  of  small  ore.     E.  H.  Simonds . .  2049 

1155  screen   sizing    test    and    assays    on    feed    and 
1144  products  of  Huntington  mills  1317 

on  classifier  jig  feed  and  tailings  at  Mill  120  1453 

1996  feed  and  products  of  double-cone  clas- 

1562  sifiers 1668 

1993  Huntington  mills 1316 

1993  feed  to  flotation  plant  at  Mill  130. .  1721,  1724 

1993  Hancock  jig,  also  on  middlings  .  . .    1443 

1150  Harz  jigs  at  Mill  144  . .  1772,  1773,  1774 

1989  Woodbury  slime  classifier  at   Mill 

162 1449 

1993  material  conveyed  in  pipe  launder  at 

1994  Guanajuato    1595 

2048  mill  feed  at  Mill  139    1750 

2049  Mill  144 1772 

2048  products  from  ball  mills    1302 

1168  Bryan  mills    1310 

482  Bryan  mills,  high-speed  rolls  and 

2048  Huntington  mills 1317 

1997  coarse  and  fine  rolls  at  Mill   162 

2049  1328,  1329 
1764                                      De  Kalb's  classifier 1402 

2048  fine  grinding  system,  Mill  105  ....    1638 

2049  Griffin  mill 1636 

1995  grinding  pans 1284 

1988  at  Mill  130 1720,  1724 

1139  Huntington  mill  at  Mill  117   1669 

1137  Richards'  vortex  classifier  at   Mill 

1137  144 1775,  1776,  1778 

1990  sand  treatment  at  Mill  117 1671 

1156  settling  tanks  at  Mill  144. ...  1776,  1777, 
2047  1779 
1461  Sherman  settling  tanks  at  Mill  132.    1406 

1560  spitzkasten  at  Mill  144 1777,  1778 

1163  stamp  mortar  at  Mill  180 1905 

1168  tailings  and  concentrates  from  stamps 

and  Lane  Chili  mill,  comparative  .    1309 

1391  from  Mill  174 1887 

2049  Woodbury  jig  at  Mill  162  ...  1449,  1450, 

1842  1451 

i!67  sizing  and  assaying 1163 

101 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Tests  to  show  relative  efficiency  of  regrinding  machines  1331 
See  Sizing  Tests. 

Tetradymite,  specific  gravity  of 1189 

Tetrahedrite,  specific  gravity  of 1189 

Thallium,  atomic  weight  of 1188 

Thames  district,  amalgamated  plates  in 750 

mills  in 1111 

plates  in 788 

New  Zealand,  mills  at 1180 

shoes  and  dies  at 183 

stamps  at   226 

Thatcher,  Arthur    viii 

Thayer  portable  one-stamp  mill 1137 

stamp  mill 1181 

Theoretical  and  actual  crushing  ribbons  of  rolls ....      101 

capacity  of  trommels    377 

value  for  hindered -settling  ratio '427 

of  free-settling  velocities 1421 

Theory  of  crushing 303 

electromagnets 790 

flotation  processes 1555 

flow  in  launders 876 

of  sand  and  water  in  launders. .  1592,  1593,  1594, 

1595 

slime  settling  1149 

suction 1462 

tube  mill  action 1336 

work  required  for  crushing 304 

Thermo-electric    couple  with    pyrometer    in  Wilfley 

roasting  furnace 1548 

Thetford,  Quebec,  asbestos  dressing  at 817,  838,  1178 

mill  at 1079 

Thickness  of  amalgamated  plates 737,  744 

bank  in  trommels 378 

bed  on  fine  concentrators    644 

on  vanners 660 

bottom  bed  on  jigs     575 

film  in  film-sizing  tests 716,  718 

on  slime  tables 695,  697 

canvas  tables 702 

hard  amalgam  on  plates    761 

ore  on  belts  of  magnetic  separators 807 

stamp  die 207 

plate  or  wire    371 

screens 341 

screens,  effect  on  percentage  of  opening 369 

water  film  on  amalgamated  plates 746 

Thick  pulp  extractor,  Ayton 1419 

Thies,  A.,  and  W.  B.  Phillips,  stamp  mill  at  Haile 

gold  mine,  North  Carolina   1175 

method  of  chlcrination  at  Mill  98 1622 

Thire,  A.,  gravity  stamps 224,  225 

Thirion  classifier 475 

Thomas  breaker 57 

J 228 

log  washer    324,  335 

R.  A.,  Dolcoath  tin  mill,  Cornwall    1183 

slag,  mill  for    1177 

Thompson,  experiments  on  magnet 794 

H.  N 1178 

dressing  asbestos  at  Thetford,  Quebec 1178 

pneumatic  concentration  at  Thetford,  Quebec     838 

pulverizer 234 

bibliography  for 294 

S.  P.,  electromagnets   xx,  833 

on  magnets 794,  795 

Thomson-Houston  dynamo 1055 

Thorium,  atomic  weight  of 1188 

Thoulet,  J.,  experiments  on  very  fine  kaolin 477 

on  settling  rates  of  fine  grains    474 

settling  in  water    1176 

velocity  of  spheres  of  different  density  and  size     477 

Thoulet's  solution 1156 

Three-high  rolls 107 

-mineral  separation 906,  911 

on  jigs 590 

riffle  tables 680 

Throw  of  Comet  breaker 43 

Gilpin  County  bumping  table 681 

Hooper  vanning  jig 506 

jigs 514,  518,  553,  594 

Johnston  vanner 1503 

Rittinger  tables 668 

Salzburg  table 683 

shaking  plates    741 

Stein,  Bilharz,  and  Luhrig  tables 670 

vanners 653,  654,  655,  658 

Thrust  of  gravity  stamps 195 

Thulium,  atomic  weight  of 1 188 

Thum's  compound  rolls 110 


Thyng,  W.  S.,  details  of  a  hand  jig   2021 

Ticonderoga,  New  York,  graphite  mill  at   1075 

Tierra  Seca  gold  separator   835 

Tiger  &  Poorman  mill    954 

Tight  and  loose  pulleys  for  jigs 532 

Tightener  on  belt  conveyors  860 

Tighteners  for  belts   1094 

stamp  belts 198 

Tilly  Foster  mill 1175 

magnetic  concentration  at  810,  833 

mine,  costs  at 1 135 

Tilting  frame  for  Wilfley  table 1467 

Timber  for  mortar  blocks 145 

riffle  blocks 721 

Time  of  cleaning  plates 757 

required  by  cyanide  operations  at  Mill  117  ....    1672 

for  magnetic  roast 1544 

retorting  783 

roast  in  galena  roaster 1548 

Tin  amalgam 730 

atomic  weight  of 1188 

bronze  plate  screens 174 

concentration  in  the  Carolinas 2046,  2047 

dredging  in  New  South  Wales 2034 

dressing 1081,  1184 

at  Mt.  Bischoff,  Tasmania.     S.  Fawns  .2037,  2040 

at  the  old  Glitters  mine 1915 

bibliography  for 1173 

in  Bolivia.     D.  H.  Bradley,  Jr    2041 

Cornwall,  England.     W.  R.  Lewis 2037 

Tasmania.     R.  Stokes 2046 

the  Malay  Peninsula.     W.  H.  Derrick 2039 

industry  of  Tasmania.     R.  Stokes 2046 

mining  in  Indo-China      2037 

ore  concentration.     J.  B.  Hill,  D.  A.  MacAlister  2046 

Cornish,  crushed  by  Husband  stamp    141 

frames  for 704 

crushed  by  Sturtevant  mill 228 

dressing  of.     R.  H.  Richards  and  C.  E.  Locke  1924 

roasted  for  porosity  829,  839 

roasting  of   56 

runs  in  Cornwall  on 478 

separation  of,  at  Altenberg 9 

worked  at  Irish  Creek,  Virginia 288 

pellets,  recovery  of.     M.  Baldauf    2030 

plate  screens 173 

specific  gravity  of  1 189 

washing.     J.  H.  D.  James  2035 

in  Cornwall    2047 

the  Malays.     R.  Stokes 2046 

Tintic  district,  Utah,  mills  in 1040,  1041,  1045 

Tires  of  rolls   65,  66 

Titanite,  specific  gravity  of 1189 

Titanium,  atomic  weight  of    1188 

Toggles,  for  Frue  vanners 645 

Toldt,  F.,  chilled  iron  shells Ill 

Tomboy  Gold  Mines  Company 1923 

Limited.     "The  60  Mill" 1660 

Tombstone,  amalgamating  pans  at 290 

Arizona,  mill  at 1175,    1180 

silver  milling  at 1016 

mill,  jigs  in 639 

Ton,  definition  of vi,  883 

equivalents  of 1 187 

of  water    1187 

Tonge,  Thomas,  concentration  from  dumps  at  Lead- 

ville,  Colorado 1179 

ore  testing  plants 2049 

Tonopah  Mining  Company's  mill.     S.  A.  Worcester  2037 
Milling,  and    Development    Company,    Boss 

cantilever  stamp-frame  at   1272 

Pachuca  stamp  battery  at 1272 

Tools  for  testing 1137 

truing  roll  shells    70 

Toothed  rolls Ill,  112,  1080 

description  of  AllSs -Chalmers  type 1242 

table  of  sizes,  capacities,  and  power 1243 

Topaz,  specific  gravity  of   1189 

Top  layer  on  jigs,  denned 495 

Total  cost 1123 

dimensions,  area,  and  thickness  of  plates 744 

Totten  &  Hogg,  makers  of  Forster  breaker   25 

Toughness  of  minerals,  effect  of    2 

Tourmaline,  specific  gravity  of 1189 

Tower  driers    1600 

at  mills 1807,  1813,  1860 

screens  at  mills   ....  1809,  1822,  1824,  1825,  1861,  1863 

Trachyte,  strength  of  301 

weight  of 1 190 

Trajectory  of  particles 4,  838 


102 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Trajectory,  use  made  of,  in  mills 889 

Tramming,  hoisting,  pumping,  etc.,  expenses 1123 

Tramway  at  mills     1696,  1719,  1769 

Transporting  power  of  water   878 

Transvaal,  milling  in  the.     J.  H.  Hammond    2033 

milling  in  the 2041 

stamps  in   225 

Transverse  traps  with  gates 772-773 

Transylvania,  Laszlo  amalgamator  in 777 

Trap  rock,  weight  of    1190 

Traps,  bibliography  for 787 

box 773 

for  mercury 768,  771,  1516 

transverse  with  gates    772-773 

Trautwine,  figures  on  discharge  from  launders 877 

flow  of  water 858 

Hering  and,  launders 885 

J.  C.,  Jr 1197 

civil  engineers'  pocket-book    xx,  1174 

coefficient  of  efflux   404 

strength  of  stone 316 

Travel  of  belt  vanners 648 

on  Stein,  Bilharz,  and  Luhrig  tables 670 

vanners    659,  660 

vanner  belts    653,  657 

Traylor  all  iron  jig 2021 

&  Company,  J.  A.  centrifugal  pumps   1610 

sand  pumps 1588 

centrifugal  pumps  at  Mill  114   1662 

capacities  of 1588 

proper  speeds  for  at  various  lifts 1589 

Centripact  screen 1352 

classifiers  at  Mill  169 1865 

concentrator 2023 

double-discharge  mortar    1266 

Engineering  Company,  Centripact  screen 1360 

Giroux  mill    1864 

Traylor  gravity  stamps    1278 

high-speed  rolls  at  Mill  158 1825 

Imperial  screen 1348 

jigs  at  mills    1864,  1867 

rolls  at  Mill  169    . .- 1864 

sectional  mortar 1267 

Trays  for  Wilfley  slimer    1504 

in  retorts 781 

Treatment  charge  on  zinc  ores 1933 

of  middlings 1121 

plates 750 

general  considerations    750 

slimes    1121 

schemes  of  mill 1613 

Trego,  T.  J.,  roasting  for  magnetism  1568 

roasting  furnace 1548 

at  Mill  148 1792 

Tregoning  pulverizer    235 

bibliography  for 297 

Tremain  steam  stamp 136,  142,  2011 

details  of 139 

number  of  drops  of 138 

Tremnitz,  Huntington  mill  at 282 

Trent  Chili  mill,  sizing  tests  of   271 

Engineering    &   Machinery  Company,   Monad- 
nock  Chili  mills  at  Mill  144 1775 

L.  C.  &  Company,  on  Chili  mill 270 

Trenton  Iron  Company 1 195 

gauge    1194 

screen  gauge 173 

Mining  and  Development  Company 1836 

Trevarns  (Camborn),  tin  mill 1083 

Triangular  gate  spigot  for  jigs  528 

Tributer's  mill 1039 

Trimountain  Mining  Company 1901 

copper  handbook 1925 

Triple  discharge  two-stamp  mills  209 

expansion  engines 1091 

pumping  engine    872 

Triplex  pump  at  Mill  117 1674 

rolls ; .  1244 

description  of 1239 

Tripoli  mine,  Ding's  roasting  furnace  at   1548 

Tripolite,  settling  rate  of 474 

Trippel,  A.,  Krom  jigs  at  the  Manhattan  mill   838 

Georgetown,  Colorado     838 

Tripper  for  belt  conveyors    860 

discharging  conveyor  belts 1586 

at  mills 1691,  1883 

Triumph  vanner 652,  659,  1499 

at  Mill  101 1627 

Trommel,  an  improved 1360 

conveyor  at  Mill  125    1700 


Trommel  hole,  relation  to  space  between  rolls 95 

screens,  cost  of  in  mills 361 

life,  cost,  and  details  of 352 

used  for  jig  screens 546 

washing  plates 488 

shafts 351 

Trommels 346,   384 

See  also  Screens. 

action  of 373 

arrangement  of  364 

at  mills..  1667,  1681,  1682,  1685,  1690,  1691,  1692, 

1693,  1701,  1702,  1703,  1706,  1707,  1710  1714  1724 

1725,  1727,  1728,  1737,  1738,  1742,  1743,  1749,  1750, 

1751,  1752,  1760,  1766,  1767,  1771,  1772,  1773.  1774, 

1792,  1796,  1797,  1798,  1799,  1815,  1818.  1828,  1829, 

1831,  1832,  1837,  1838,  1842,  1843,  1846,  1851,  1857, 

1864,  1866,  1867,  1876,  1877,  1882,  1884,  1889,  1890, 
1898,  1913,  1928,  1929,  1930 

attachment  of 355 

capacity  of 377 

speed,  etc 359 

cones,  pyramids,  and  prisms 361 

connected  with  log  washer    323 

construction  of  in  mills    350 

cylindrical : 348 

Denver  Engineering  Works,  revolving  grizzly   . .  1353 

depth  of  bank  and  quality  of  work 380 

details  of  trommel  screens  at  Mill  125 1705 

diameter  of 349 

dimensions  and  operation  of 347 

driving  mechanism 356 

effect  of  centrifugal  force  in   373 

diameter  of 379 

length  and  slope   378 

slope  in 377 

speed  of    379 

feeding  of 357 

for  dredges 1007,  1008,  1012 

friction  angle  in 374 

Gates  all-iron  frame  revolving  screen 1353,  1360 

in  stamp  mills 1017 

kinds  of,  in  mills 348 

length  of 349 

life,  speed,  slope,  etc 362 

Neuerberg 385 

octagonal    1353, 1360 

path  of  grains  in 377 

pitch  angle  in 376 

position  of    1108 

power  for   357 

principle  of 346 

purpose  of    346 

rate  of  travel  of  ore  in 374 

receiving  cones  for   358 

Schmidt  spiral  screen 363,   364 

sectional  1353 

sizing  tests  on.  .381,  382,  1140,  1141,  1142,  1143,  1144 

slope  and  length   380 

slope  of 349 

speed  of    349 

speeds,  pitch  angle,  etc 376 

spiders  for    352 

submerged  trommels  at  Mill  125 1356 

systems  of 364 

tandem  and  concentric 362 

tests  of  work  of  in  mills 381 

thickness  of  bank  in 378 

use  of  wash.     C.  Blomeke 2018 

versus  Rowand  incline  screens  at  Mill  141 1764 

riddles 365 

wash   55,   329 

water  for 358 

wear  of  screens   356 

without  internal  shafts 351 

Trough  classifiers   389 

double 416 

or  shallow-pocket  classifier  1371 

washers 319 

bibliography  for 334 

washing  for  corundum 1078 

Troughs.     See  also  Launders. 

for  mercury  traps   772 

jerking 861 

Troy  weights,  equivalents  of 1187 

Truesdale  coal  breaker    2050 

Truing  roll  shells    69 

Sturtevant  roll  shell  turning  device 1243 

with  an  emery  wheel    1243 

Trunking  machine    321 

table    320 


103 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Trunking  table  for  cleaning  jig  concentrates    .......     587 

Trustedt  magnetic  separator  .....................     835 

Tube  mill,  a  double  ............................   2017 

action,  theory  of.     H.  A.  White  ............    1323 

crushing  efficiency  of.     W.  A.  Caldecott  and 
S.  H.  Pearce    ..........................    1323 

experiences  in  El  Oro,  valuable.     C.  Butters     2016 
feeder,  a  special.     W.  H.  Fox    .............   2014 

E.  G.  Banks  .....................  2013 

grinding  in  New  Zealand  ..................   2013 

on  the  Rand  ...........................    2017 

installations,  design  of.   A.  James  ..........    2014 

liners,  wear,  cost.     S.  D.  McNicken  ........    2016 

lining  at  the  Standard  mine.     W.  W.  Bradley  2013 
patents    .................................   2017 

practice  in  S.  Africa  ..................  2015,  2016 

New  Zealand  ....................  2014,  2015 

S.  Africa.     K.  L.  Graham  ........   2013,  2014 

W.  R.  Bowling  .........................   2013 

results  in  S.  Africa.    H.  Leupold  ...........   2016 

mills          ..............................  233,  1285 

Abbe  ...............................  1280,  1298 

mill  at  Guanajuato  .....................    1290 

capacity  of  .......................    1291 

at  Mill  103  ..........................    1271 

Alsing  .........................  1280,  1294,  1323 

Allis-Chalmers  ...........................    1323 

an  article  on.     A.  H.  Bromley  .............   2013 

at  El  Oro.     E.  Burt  ......................   2013 

Guanajuato,  Mexico.     C.  W.  Van  Law  ...   2014 
mills  ........................  1532,  1770,  1922 

the  Gold  King  mill,  Colorado.     F.  E.  Shep- 

ard  ...............................   2014 

the  Waihi  mines.     R.  Stokes  .............   2014 

bibliography  for  ..........................     293 

capacity  of  ...............................    1291 

classification  of   ..........................    1285 

consumption  of  pebbles  and  liners  ..........    1291 

at  Mill  118  ...................  .   1291 

cost  of  grinding  by  ........................    1291 

Davidsen  ...........................  1280    1297 

Denver  Engineering  Works  Company's   mill 

1280,  1296 
direction  of  rotation  for  ...................    1289 

discharge  of  ..............................    1287 

discussion  of  the.     A.  James   ..............   2015 

A.  W.  Warwick  ......................   2015 

efficiency  of    .............................   1292 

El  Oro  lining  for  .........................    1340 

feeding  of  ................................    1288 

P.  Argall  ............................   1323 

feed  opening  for    .........................    1287 

for  cement  grinding   ......................   2017 

fine  grinding.     Davidsen  ................   2015 

foundations  for   ..........................    1286 

Gates  ..............................  1280,  1296 

general  notes   ............................    1294 

Hardinge  conical  ....................  1280,  1296 

in  S.  Africa,  work  of.     S.  H.  Pearce  and  W. 
A.  Caldecott  ...........................   2013 

liners  for  ................................    1286 

linings  for,  discussion  by  H.  A.  White.  .  1339,  1340 
management  of  ..........................    1290 

on  the  Rand,  advantages  of  ...............    1644 

complete  account  of  .................   2015 

operation  of.     H.  Fischer   .................    1340 

pebbles  or  flints  for    ......................    1288 

power  required  to  operate  .................    1289 

quality  of  work  done  by  tube  mills  .........    1290 

sizes  best  suited  for  feed  to  ................    1288 

speed  of  rotation  for  .................  1289,  1337 

theory  of  tube-mill  action  ..................    1336 

versus  grinding  pans  ......................    1282 

R. 


C.  Clark 
in  Australia 
with  central  end  discharge 
work  of 
Tubular  classifier 

investigation  of  free  settling 

on  fine  grains 

Richards' 


2014,  2016 
2014 
1294 
2013 
421 
469 
473 
428 


tests  on  hindered  settling  ..................  610 

results  of  ..............................  613 

driers,  cylindrical  driers  ......................  1596 

free-settling  classifiers  .......................  1381 

Tucker,  W.  A  ..................................  viii 

Tuff,  machine  best  suited  for  crushing  ............  2010 

Tullock  concentrators,  water  used  in  ..............  659 

feeder  ...................................  136,  854 

for  gravity  stamps  ........................  199 


Tullock  feeder  for  jigs    

rolls 

trommels 

used  in  Bryan  mills    

Huntington  mill 


549 
71 

358 

272 

278 


vanner . 
Tumbler  on  dredges 


.652,  656,  659 
1008 
1188 


ten,  atomic  weight  of 

i    Colorado,    concentration   of.     H.    R.    Van 

Wagenen 2035" 

mills  cf  Colorado,  ideas  on  the    2046 

ore  concentrates,  cost  of  producing  in  Colorado  1987* 
ores  in  Colorado,  concentration  of.     H.  R.  Van 

Wagenen 2041  * 

treatment  of.     W.  Greenawalt 2038  • 

of  Colorado,  mills  that  treat  the    2042 

treatment  of 2047- 

Turbine  water  wheels 1089 

Turbo  log  washer 1341 

at  Mill  154    1341,  1816 

power  required  for    1816 

Turgite,  specific  gravity  of   1 189 

Tuscany,  mills  in    1177 

mill  for  quicksilver  ores 1074 

Tustin  mill 316,  1014,  1047 

bibliography  for 294 

number  used    231 

power  needed  for    311 

sizing  tests  of  products  of,  in  Oro  Plata,  and 

Utica  mines   309 

theory  of  crushing  by 310 

Tustin's  pulverizing  mill 233,   262 

Tuttle,  E.  G.,  double  discharge  on  the  tail  of  a  jig     640 

tail  discharges  on  a  Harz  jig 640 

Manufacturing  &  Supply  Company,  rolls 76 

slime  table   687 

Tutty,  E.  J.,  on  capacity  of  jigs   602 

Twelve  Apostles  mill,  amalgam  in 767,  783 

Two-current  classifier 1 144 

-stamp  mills ' 

-mineral  separation  on  jigs 589 

Tye    707,  727 

Tyler  Company,  W.  S.,  wire  cloth  screens 1366 

double-crimped  screens 354 

mining  wire  cloth  1364 

screen  cloth  used  at  Mill  101 1626 

gauge 173 

screens 1  <  * 

used  on  Waddell  Chili  mills  at  Mill  174   ....    1886 

trommel  screens  at  Mill  142 1766,  1767 

W.  S.  Co.,  cost  of  screens 548 

double-crimped  wire  screens 370 

mining  wire  cloth   1364 

table  of  screen  meshes l: 

testing  screens H3j 

on  material  for  screens 355 

Wire  Works  Company 1194 

Types  of  rolls    75 

steam  stamps 114 


U 

Ullrich  magnetic  separator   1535 

at  Australian  Metals  Company's  mill 1535 

Ultra-microscope 1419 

the,  for  the  study  of  slimes 1401 

-violet  rays  for  the  detection  of  willemite.     E.  K. 

Judd     2048 

Ulzer,  F.  and  A.  Fraenkel,  chemical-technical  anal- 
ysis      xx 

Schone's  tubular  classifier 476 

Uncle  Sam  Consolidated  Mining  Company,  Callow 

cones  at 1404 

Undercurrent  726 

classifier,  Richards' 1386 

for  saving  black  sands.     R.  H.  Richards 2020 

Under-piston  jigs 520 

Undershot  water  wheels 1090 

Undersize   by  different  speeds  of  crushing,  variation 

in  the  per  cent.  of.     A.  W.  Gartrell 2017 

Unfinished  grains   318 

Union  Bay,  Vancouver  Island,  coal  washer  at    1106 

Iron  Works    1184 

amalgamating  pan 243,  244,  245,  246,  247, 

249 


Blake  breaker    

Dodd  tables  at  Mill  96   .... 

grizzlies 

iron  battery  frame 


21 

1618 

337 

.     228 


104 


Pages  1199-1610,  Vol.  III. 


Union  Iron  Works  iron  frame  vanner 651 

mortar  bolts  150 

mortars  at  Mill  117   1668 

on  classifying  vanner  feed 658 

design  of  cams 196 

stamp  clearance 195 

vanners 655 

rolls 72,  111 

stamp  details  of   cylinder,  water  used   and 

capacity 126 

frames 153 

stamps  at  Mill  96 1618 

steam  stamp.. .  .114,  117,  118,  119,  122,  123,  126, 

127,  128 

mUl   947 

of  the  Standard  Mining  Company xxvi 

Gratz,  Kentucky.     R.  B.  Brinsmade 2038 

Mining  Company,  Finder  concentrators  at   ....    1481 

Unit  of  magnetic  force 79 1 

pole  of  magnetism ' 791 

Units  of  measurements 1 187 

United   Iron   Works   Company,    Cleveland-Knowles 

magnetic  separator -  -    1542 

States  Metal  Reduction  Co.     The  Leighton  mag- 
netic separator -. 1528 

Standard  gauge. 1195 

screen  gauge 173 

University  of  Minnesota,  testing  plant 1176,  1179 

Unlocking  of  mineral  by  crushing 303 

Unwaterers 879 

Unwatering  wheel  at  Mill  141   1591 

boxes 450 

for  jig  concentrates 586 

tailings    588 

mechanical 879 

screens  724,  879 

sieves  for  jig  discharges 586 

tailings    587 

table  of  details  of  in  mills 451 

tailings    587 

wheels 1590 

Unwin,    W.   C.,   development   and   transmission   of 

power   . xx 

rope  transmission   1095 

transmission  of  power    1174 

Upper  Silesia,  mill  in 1177 

Urals,  placer  mining  in  the.     C.  Tappan 2036 

Uranium,  atomic  weight  of 1188 

Uren  belt  table 698 

Urie  dredge    1011 

Use  of  steam  in  settling  slimes  at  Mill  144 1779 

Useless  apparatus 1 109 

Uses  and  method  of  working  of  amalgamating  pans     248 

of  pulverizers 232,  236 

steam  stamps 134 

supplementary  principles 5 

water  in  breakers   49 

trommels 358 

Utah  Copper  Company 1852 

Bingham,  Utah,  milling  the  ores  of.     P.  Bar- 
ker    2043 

mill,  Bingham,  Utah    2038 

mill,  Garneld,  Utah,  the  mill  of  the.     L.  H. 

Beason    2045 

cost  of  milling  in    1129,  1134 

producing  copper  in 1955,  1956 

district,  cost  of  producing  lead  and  silver  in 1966, 

1967,  1968 

mill,  flow  sheet  of  the  University  of   2046 

mill  in 1085,  1174,  1184 

Ute  &  Ulay  mill xxvi,  935 

Utica,  California,  milling  practice  at.     W.  J.  Loring  2043 

Utica  cam  stick 200 

Company  mills 1024,  1033,  1034 

mine,  sizing  tests  on  ore  from 309 

mill    1033 

California,  stamp  practice  at  the.     W.  J.  Lor- 
ing    2033 

of  the  Utica  Company xxviii 

stamps 224 

mills., 1176 

plates  in   '. 788 

-Stickles  canvas  plant 1038 

mill    xxviii 

Utsch  jig 519,  640,  641,  837 


INDEX.  Pages  1611-2052,  Vol.  IV. 

Vale,  W.  H.,  gravity  stamps 224 

amalgamating  plates 788 

Valentinite,  specific  gravity  of 1189 

Value  of  ore  affecting  extraction 1117 

precious  metal  contents  of  zinc  ores 1939 

Valve  for  steam  stamps 122 

gears  of  Nordberg  steam  stamps 1249 

motion  for  steam  stamps 122,  127 

of  Tremain  stamp '  133 

Valves  for  pulsion  jig 520,  538 

of  Nordberg  steam  stamps   1249 

on  engines 1Q91 

Vanadium,  atomic  weight  of 1188 

Van  Law,  C.  W.,  discussion  of  tube  mills  at  Guana- 
juato, Mexico 2016 

Meter  Boss  oil  concentrators    2044 

J.  W.,  system  of  oil-concentration 1992 

oil-concentration  process  at  Santa  Barbara   . .    1993 

Process    1997 

testing  apparatus 1991,  1992,  1993 

Ryn  Gold  Mines  Estate  mill.     G.  A.  Denny  . . .   2041 

slime  treatment  at ". . .  .    1410 

Wagenen,    H.    R.,    concentration    of    Colorado 

tungsten  ores 2041 

tungsten  milling  in  Colorado   2035 

Vanners 1464,  1498 

action  of 644,  646 

adjustment,  feed,  capacity,  etc 648 

of  travel,  slope,  and  water 660 

agitation  ratio    665 

Akens  and  Evans  slimer   1500 

Allis-Chalmers  suspended  frame    1503 

arrangement  of 1110 

at  mills 1686,  1687,  1739,  1778,  1780,  1868,  1870, 

1929,  1930 

banks  on 652,  656,  662 

bed  of  pulp  on  belt  in 660 

belt 647,  657 

Woodbury 655 

belts,  corrugated  versus  smooth  at  Mill  167 1859 

"crack-proof"  vanner  belt    1503 

details  of 648 

Spadone  concentrator  belt 1503 

bibliography  for 727 

box-cleaning  device  used  at  Mill  167    1503 

capacity  of 662 

cards  of 657 

classification  of 645,  1499 

classifiers  for   658 

Colorado  Iron  Works 652 

concentrating  and  cleaning  planes 646 

consistency  of  pulp  for,  Mill  163 1848 

cost  of .     691 


Vacuum  dredge 1009 

oil-process,  Elmore 1556 


repairs 663 

coupled  with  slime  table  1110 

"  crack -proof  "  vanner  belt    1503 

depth  of  bed 1510 

dry 83& 

Ellis 657 

concentrator 1499 

Embrey 653 

end-shake 652,  1153,  1165 

feed,  proper  consistency  for    1404 

feeder    655 

fcr  testing 1153 

Frue 645,  1153,  1499 

G.  Gates,  end  shake 653 

Gates  Iron  Works 651 

gyrating 657 

in  the  plane  of  the  belt 1501 

F.  T.  Snyder 2022 

Horn  rotary  slime  concentrator   1499 

in  reserve   1 109 

Johnston 652,  1499,  1501 

Joshua  Hendy  machine  works 652 

losses  on 656 

modifications  of  Frue 651 

Norbom 652 

operation  of 657 

plates  on 740 

power  for   663 

principle  of 644 

separation  by 665 

quality  of  feed  658 

quantities  of  water  in 659 

removal  of  concentrates 647 

repairs  on 663 

results  at  Mill  101    1628 

Risdon  Iron  Works  651,  652 

side-shake 645,  1499 


105 


Pages  1-643,  Vol.  I. 


Vanners,  side-shake  versus  end-shake 655 

slope  in  degrees  and  inches 1191 

Snyder 657 

Spadone  concentrator  belt 1503 

speed,  travel,  slope,  water,  etc 658,  659,  660 

steep  end-shake 1165 

testing 1171 

tests  on 664,  666 

thickness  of  bed  on 660 

Triumph 652,  1499 

Tulloch 652,  656 

concentrator 652 

Union  Iron  Works,  iron  frame 651 

•versus  convex  slime  tables 691 

with  tipping  or  undulating  motion 1501 

Johnston  vanner 1501 

suspended  frame  vanner   1503 

Woodbury 654 

Vanning  shovel  1152 

tests 1170 

plaque 1152 

Vapart  disintegrator 236,  289,  891 

at  Lintorf ,  Prussia 830 

bibliography  for 299 

Varney  amalgamating  pan    291 

Vats  for  electroplating  copper  plates 755 

silver  plating   755 

Vaucron  mill  1 178 

classifiers  at 416,  477 

jigs  in   641 

number  of  sieves  for  jigs 590 

rolls  at 110 

sieve  scale  at  367 

stroke  of  jigs  at 594 

V-box  classifiers 419 

Vein  quartz,  weight  of 1190 

Veitch,  Alexander,  on  Hancock  jig 1441 

Velardena  Mining  and  Smelting  Company 1742 

Velocities,  application  of  free  settling  to  classified  de- 
sign     1432 

ratio  free  to  hindered  settling  to  classifier 

design  1433 

full-teeter  velocities  of  quartz  and  galena 1430 

free  settling    471 

of  currents  in  classifier 429 

fall  of  minerals  in  water 621 

settling  curves  of 467,  473 

particles  falling  in  water  and  in  air 837 

water  in  film  sizing  tests 716,  719 

Velocity  card  of  steam  stamp 132 

curves  of  gravity  stamps   216 

of  a  sphere  falling  through  a  viscous  body.     Sir 

G.  C.  Stokes   1433 

current  in  settling  tanks 454 

fall  of  lead  shot 626 

flow  in  launders 877 

galena  and   quartz  falling  in  water.     R.  H. 

Richards 1433 

pulsion  in  jigging   1460 

rolls  and  stamps 314 

settling,  effect  of 4 

of  fine  grains 473 

grains 466 

under  free-settling  conditions  1421 

vibrations  of  Wilfley  table  deck 1466 

water  on  jigs  595 

waves  on  amalgamated  plates 746 

Venezuela,  mill  in 1127 

Ventilation 1099 

Verdigris  on  amalgamated  plates 750,  762 

Verein  Chemischer  Fabriken    1914 

Vermilion  hematite,  action  of  Monarch  breaker  on . .       28 
Vertical  and  horizontal  shafts  of  amalgamating  pans     241 

mills 255 

Vezin  feeder  for  rolls 71 

H.  A., viii 

effect  of  strength  and  specific  gravity  on  crush- 
ing power 316 

on  belts 1094 

cost  of  mills. 1126 

dust  prevention 1099 

heating  mills    1099 

intermediary  jigs 642,  1179 

jig  plunger  clearance 530 

samplers  versus  hand  sampling    884 

sampling 850 

stroke  of  jigs  594 

testing  jig 1151 

weight  of  broken  ore    1190 

wet  screening 1139 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Vezin  jig     1150 

journal  pressure  in  rolls 96 

rolls 84 

sampler 846,  1572,  2032 

for  sampling  high-grade  telluride  gold  ores ....    1573 

requisites  to  accuracy  when  using 1575. 

samples  at  mills. . .  1691,  1701,  1737,  1742,  1748,  1750, 

1772 

springs  for  rolls 90 

Vial  magnetic  separator 835 

Vibracone  separator,  the 1352,  1360 

Vibrating  grizzlies 341,  345 

and  riddles 1346 

Vibrations  in  vanners 658 

Vibrometer  screen.     W.  W.  Beaumont 2018 

Vibromotor  screen 385 

Vickers-Maxim  steel  roll  shells  at  Mill  128 1714 

Victor  turbine  wheel 1089 

Victoria  mill xxix,  1052 

mills  in 1180 

New  Zealand,  weight  of  ore   1191 

milling  in   1 176 

stamps  hi 224,  226 

Vieille  mill 906 

Montagne  Company 1116 

heating  ore  for  friability    9 

mill 911 

separation  of  pyrite  and  blende 829 

new  Central  mill 1786 

Vigeon,  E.  C.,  wear  of  steel  balls 1303 

Villefort,  Lozere,  France,  belt  tables  at   700 

mill  at 1178 

Virgilina,  concentration  at.     E.  K.  Judd 2038 

Virginia  City,  Nevada,  milling  practice  at.     C.   T. 

Rice ' ... 2038 

mill,  amalgamated  plates  hi 767 

pyrite  mills.     R.  H.  Painter 2037 

zinc  ore,  concentration  of.    T.  L.  Watson 2042 

Viscosity  of  liquid,  effect  on  free  settling 465 

Vivianite,  specific  gravity  of 1 189 

Vogt,  G 1186 

Vogt,  G.,  testing  of  clays 1185 

Volts.     See  also  Power. 

Volume  of  broken  ore    1190 

units  of  1187 

Von  Dessauer,  H.  A 789 

on  amalgamated  plates 767 

Hauer,  J 838 

Reytt,  K 308,  316,  1107 

breaking 60 

moisture  in  ore   1 106 

power  and  surface  measurements,  table  of 

results  of 306 

for  stamps    205 

used  by  rolls    98 

sizing  test  of  breaker  product 47 

tests  on  work  required  for  crushing 305 

Vortex  classifiers,  Richards'  annular  vortex  classifiers  1382 

at  mill  124 1692,  1693,  1694 

Richards'  pocket  vortex  classifier 1373 

single-spigot 1377 

tank  vortex  classifier 1379 

for  classifier 403 

W 

Wad,  specific  gravity  of 1189 

Waddell  Chili  mill  at  Mill  174 1886 

Wagemann,  C.,  tin  concentration  at  Ploermel,  France  1177 

Wage  scale  at  mills..  1619,  1621,  1622,  1626,  1629,  1633, 

1657,  1664,   1676,  1678,   1680,  1685,  1687,  1688,  1690, 

1698,  1705,  1712,  1730,  1745,  1757, 1794, 1804,  1816, 1820, 

1830,  1841,  1848,  1852,  1859,  1865,  1881,  1919 

in  the  San  Juan  district  of  Colorado 1980 

Wages  of  labor   1100 

Wagner  mica-plate  static  machine  used  with  Blake- 

Morscher  electrical  ore  separator 1551 

Wagoner,  L 262 

formula  for  free  settling 472 

free  settling  in  water    477 

theory  of  power  required  in  crushing   310 

Tustin  mill. .  . . . !? 264,  294,  316 

velocity  of  particles  falling  in  water 478 

Wagons  for  concentrates 1112 

Walburn  and  Swensen  Company 77 

rolls 76 

breaker  of  Blake  type    23 

Waldeyer  on  riffles 721 

Wales,  dry  separation  in 820 

Wales,  gold  milling  in.     W.  H.  Booth 2035 


106 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Wales,  milling  of  lead  and  zinc  in  northern.    E.  Walker  2039 

Walker,  E.,  the  Elmore  flotation  process 1569 

pulverizer 236 

bibliography  for 299 

Walker's  patent  stamp 227 

Wall  finger  gear  rolls Ill 

jig    2021 

Wallace,  Idaho,  mill  at   947 

steel  breaker 2010 

Wall's  mill,  Bingham  Canyon,  Utah 2038 

Waltl,  V.,  Oberegger  gyrating  screens     386 

Wunderlich  trough  classifier  for  coal 478 

Warm,  E.  E.,  discusses  fine  grinding    2016 

Wappler,  A.  F.,  Frobel's  mill 291 

Ward,  W.  P.,  Hundt's  settling  tub,  Rittinger's  setzrad, 

Rittinger's  pointed  boxes 478 

Stapff  and  Cazin  jigs 643 

Wardner,  Idaho,  mill  at    945,  1183 

Waring  magnetic  separator 1182 

separators  at  Mill  148 1792 

pulyerator 234 

bibliography  for 294 

system  of  magnetic   separations,  description  of 

the     2026 

Warp  and  woof  on  canvas  tables 700 

Warren,  A.  Sidney,  free-settling  velocities    1421 

belt  vanners  at  Mill  128 1715 

Warwick,  A.  W.,  definition  of  slime 1399 

discussion  of  the  tube  mill    2015 

fine  grinding 1340 

in  the  tube  mill 2015 

finely  ground  slimes 1420 

hand  sorting  in  small  mills 2032 

history  of  concentration 2049 

on  slimes 2020 

power  for  stamp  mills   2044 

stamp  mill  foundations    2044 

the  A.  M.  W.  mill  at  Leadville,  Colo 2043 

Wascott,  stamps  in  Gilpin  County,  Colorado  229 

Washburn  &  Moen 171,  1196 

Washburn  &  Moen  screen  gauge    173 

wire  gauge  1194,  1364,  1999 

Washers.     See  Log  Washers. 

Dorr  mechanical  classifier 1343 

for  clay 1076 

log 55,    320 

preliminary 319,    1341 

trough 319 

using  rotating  stirrers 1341 

Washing  before  hand  picking 481 

box  before  hand  picking   488 

canvas  tables 701  ,702 

clay  and  kaolin 1075 

cocoa  matting    703 

devices  on  slime  tables 689 

diamonds    1080 

drum  at  Mill  95    1617 

followed  by  hand  picking  and  sizing 1616 

machinery 1244 

ore  at  Elkton  Mine 1616 

pans 333 

bibliography  for 334 

for  corundum    335,  1078 

diamondiferous  earth 335 

pits 335 

placer  gravel    723 

preliminary,  bibliography  for 334 

tank  with  hand  picking 488 

Washington,  gold  mill  at  Republic 2036 

Washoe  concentrator 1836,  2042,  2045 

Copper  Company  1836 

district ,, 1105 

plant  of  the  Anaconda  Copper  Co.     L.  S.  Aus- 
tin  2033,2043 

process 1039,  1173 


of  amalgamation .  . . 

smelter 

Montana 

Wash  trommels 

bibliography  f or  . . . 

Bradford 

Carnall 


248 

2042 

1924 

...55,329,  1341 
334 
330 
334 


compared  with  log  washers 333 

Crickboom 330-334 

cylindrical,  used  at  Cabarceno,  Spain 330 

for  disintegrating  clay    335 

Krupp 1341 

versus  log  washers 333 

water  distributor  for  vanners   646,  654 

Wilfley  table 674 


Wash  water  for  trommels 358 

on  slime  tables  684,  695 

pipes  on  slime  table 688 

required  by  canvas  tables  at  Mill  139 1755 

Chalmers  &  Williams  vanners  at  Mill  122  1687 

Frue  vanners  at  mills. .  .  1662,  1694,  1695,  1706, 

1755,  1880 

Harz  jigs  at  mills 1744,  1751,  1752,  1753, 

1877,  1878,  1879 

James  slimer   1492 

table    1491 

New  Standard  concentrator    1479 

picking  belt  at  Mill  154 1816 

Richards'  -Coggin  classifier  at  Mill  173  .  .    1878 

Richards'  vortex  classifiers  at  mills.  .  1692, 1693, 

1694,  1743,  1744,  1751,  1752,  1753,  1755, 

1775,  1776,  1778 

rolls  at  Mill  173 1877 

round  tables  at  Mill  180 1904,  1905 

single-spigot  classifier  at  Mill  180. ..  1902,  1903 

trommels  at  mills 1691,  1692,  1693,  1743, 

1772,  1773,  1774,  1816,  1876,  1877 

Wilfley  tables 1469 

at  mills  . .  1661,  1662,  1687,  1706,  1744,  1745, 
1754,  1880 

Wasp  No.  2  mill,  Kirk,  S.  Dakota     2044 

Waste  picked  out  in  mine  for  stowing   481 

Water,  acid,  effect  of  on  screens 173 

column,  weight  of 1188 

consumption 2048 

at  Arizona  mills 1931 

Butte.     C.  W.  Goodale 1420,  1997 

Cananea.     O.  P.  Findley    1419 

Eureka  Hill.     G.  W.  Riter 2036 

Longfellow  concentrator 1931 

mills  . . .  1413,  1622,  1640,  1648,  1664,  1698,  1699, 

1700,  1706,  1709,  1712,  1715,  1730,  1731,  1746, 

1757,  1762,  1786,  1794,  1802,  1816,  1817,  1840, 

1848,  1853,  1856,  1859,  1865,  1875,  1882,  1887, 

1891,  1894,  1897,  1912,  1932 

Montana  copper-sulphide  mills    1931 

Northern  Mexico  mills     1931 

Shannon  concentrator 1931 

Washington,  Arizona,  plant    1411 

in  Arizona.    D.  E.  Woodbridge 1997 

Australasian  practice 1713 

on  the  Rand 1410 

current  in  launders,  speed  necessary  to  carry 

sand 878 

economy  in  mill.     J.  C.  Scobey 1419 

stamp  milling.     A.W.Warwick   2011 

effect  of  temperature  on  amalgamation 766 

flow  of 885 

for  Atwood  amalgamator 776 

breaking  rock  after  heating 9 

classifier    403,  432 

calculation  of 429 

Conkling  jig 503 

dredging 1013 

Ferraris  belt  table 698 

classifier   401 

German  sweeping  table 703 

gravity  stamps,  amount  and  temperature  ....     221 

Hallett  table 676 

Heberwasche  522 

jigs 510,  519,  537,  598 

Lake  Superior  hog  trough  classifier 390 

log  washer   324 

mills 1102 

Parsons  table 669 

&  Fisher  jig    518 

Richards-Coggin  classifier 392 

Rittinger  table 668 

Salzburg  table 683 

Schmidt  spiral  screen 363 

Schranz  jig 503 

sluices 723 

spitzlutte  424 

stamps 206 

Stein,  Bilharz,  and  Luhrig  tables 670 

Tamarack  classifier 398 

Tremain  steam  stamp   139 

trommels 358 

wash  trommels 330,  331,  332 

in  coal  washing,  recovery.     F.  W.  Parsons 2020 

gravity  stamps,   amount  and    temperature  of     221 

launders,  mean  velocities  of    877 

stamp  pulp 413 

jet  for  disintegration 1007 

measurement  of 1161 


107 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Water  on  amalgamated  plates 

pipes  for  gravity  stamps 

jigs 


773 

199 

538 

power    1174 

effect  on  cost 1128 

for  mills 1089 

pumps 868,  871 

quantities  of,  in  rectangular  launders 878 

quantity  for  film  sizing    707 

slime  tables    720 

recovered  by  settling 460 

recovery.     G.  E.  Binckley 1419 

at  Goldfield,  Nevada    2020 

regulators 858 

required  by  canvas  tables  at  Mill  144 1779 

Card  tables  at  Mill  144 1777 

classifiers  at  Mill  165 1852 

Evans  and  Hancock  jigs  compared 1442 

Ferraris  patent  tables,  table  of 1490 

Frue  vanners  at  Mill  100    1625 

Hancock  jigs 1441 

working  on  Montana  copper  ores   ....    1442 
Harz  jigs  at  mills. . .  1692,  1693,  1694,  1772,  1773. 

1774,  1775^ 
Hodge  jigs  at  Mill  180. ...  1902,  1903,  1904,  1905 

Huntington  mills  at  mills 1687,  1706,  1753 

individual  machines  at  mills  . . .  1698,  1699,  1700, 

1780,  1816 

at  Mill  126 1707,   1708 

iton  vanners   1502 

at  Mill  165 1852 

log  washers  at  Mill  154 1816 

New  Humboldt  concentrator    1494 

Nissen  stamps  at  Mill  165    1852 

Nordberg  steeple-compound  steam  stamp  at 

Mill  180   1901 

stamps  at  mills 1621,  1624 

suspended  frame  vanner 1503 

turbo  at  Mill  154 1816 

vanners  at  Mill  144   1778 

water  jackets  of  Wilfley  roaster  at  Mill  140.    1759 

Wilfley  slimer 1506 

tables  at  mills. . . .  1625,  1694,  1695,  1708,  1776, 
1777,  1852,  1904 

Woodbury  table 1496 

separation.     W.  J.  May    2021 

softening  of    1027 

Collett 1319 

spray  pipe  on  Hallett  table 676 

supply  at  Mill  158 1827 

pumps  for 871 

table  of  weights  and  measurements  of   1187 

tanks 1106 

tube  boilers 1090 

used  by  Brink  &  Hubner's  disintegrator 286 

Heberlimill 259 

Huntington  mill 280 

Schranz  mill 275 

trommels 360 

in  Blake  breakers,  table  of 26 

breakers    49 

Bryan  mill  272 

Forster  breaker  in  Mill  67    28 

mills.    See  Individual  Mills  in  Chapter  XX. 

steam  stamps 126-129 

on  amalgamated  plates    745 

jigs    596,597 

slime  tables    694 

steam  stamps 129 

vanners 659,  660 

value  of  miner's  inch 1197 

versus  air  for  concentration 825 

weights  and  volumes  of 1187 

wheel  for  arrastra 238,  239 

wheels 1089 

in  mills.     See  Individual  Mills  in  Chapter  XX. 

with  classifier  pulp 418 

Waters,  Theodore,  Edison's  plant  in  New  Jersey  ...    1183 

Watertown  Arsenal,  tests  on  stone 316 

strength  of  stone     300 

..   2015 


Wauchope,  T.  A.,  stage  crushing 

Waugh    and     Bignell,    dry    concentration    process. 

D.  D.  Wolff 2026 

dry  vanner 838 

Waverly  mill,  breaker  in 60 

stamps  in 228 

Nova  Scotia,  mill  at 1026 

Waves  in  film-sizing  tests   717 

on  amalgamated  plates    746 

canvas  tables ...                                702 


Waves  on  slime  tables    695 

Wear  of  Alsing  cylinder 267 

amalgamating  pan    249 

ball  mill   261 

belt  conveyors    860 

Blake  breakers 25 

breakers 56 

Bryan  mills    272 

buhrstone  mill   253 

Chili  mill    269 

centrifugal  pumps 870 

Cyclone  pulverizer    289 

Dodge  breakers 31 

Forster  breaker 28 

Griffin  roller  mill    282 

grizzlies 340 

Heberli  mill 259 

Huntington  mill 280 

jigs 604 

jig  screens 547 

log  washer   324 

pebbles  in  Alsing  cylinder 267 

punched  steel  screens  at  Mill  144  1365 

rolls 108 

roll  shells    66 

at  mills 1877,  1906 

Schranz  mill 276 

screens 169,  170,  343 

at  Mill  139    1365 

effect  of  moisture  on 341 

in  trommels   356 

shoes  and  dies 182,  183,  184 

in  grinding  pans 1284 

steel  ball  in  ball  mills 1303 

Sturtevant  mill 288 

Whelpley  &  Storer  pulverizer 289 

Wearing  parts.     See  also  each  machine. 

for  jaw  breakers,  Krupp's 1221 

stamp  batteries,  materials  for 1277 

steam  stamps 121 

life  of  1222,  1223 

materials  for 1220 

of  Allis-Chalmers  rolls  at  Mill  179    1898 

ball  mills  at  Mill  159 1828 

Blake  breakers  at  mills. . . .  1221,  1621,  1749,  1853 

breakers    48,  56 

life  of 1221 

Bryan  mills  at  Mill  173 1879 

Buchanan  jaw  breakers  at  Mill  157   1818 

Butters'  centrifugal  pumps  at  Mill  117 1671, 

1672,  1674 

Byron-Jackson  pump  at  Mill  114   1662 

centrifugal  pumps  at  mills 1711,  1712,  1856, 

1904,  1908 

drag  or  disc  conveyors 1583 

elevators  at  mills  . .  .  1707,  1710,  1711,  1818,  1819, 

1853,  1854,  1855,  1877,  1880,  1898 

Gates  breakers  at  mills. . .  1706,  1716,  1727,  1828, 

1853 

Griffin  mills  at  Mill  105 1636 

grinding  pans,  life  of   1638 

Hancock  jigs  1443 

Hodge  and  Cleaves  sand  pumps  at  Mill  182 

1910,  1911 

jigs  at  Mill  180 1902,  1903,  1904,  1905 

Huntington  mills  at  mills.  .  1317,  1669,  1687,  1711, 

1753 
Knowles  duplex  vacuum  pumps  at  Mill  114  1673 

triplex  pumps  at  Mill  117 1674 

Krogh  pumps  at  Mill  100 1626 

life  of 1633 

McCully  breakers  at  Mill  139    1222,  1749 

Monadnock  Chili  mills  at  Mill  144 1775 

Nordberg   steeple-compound    steam    stamp 

at  Mill  180 1901,  1902 

rolls  at  mills  . .  1244,  1685,  1686,  1710,  1714,  1771, 
1773,  1774,  1854 

materials  for 1243 

Sherman  Huntington  mills  at  Mill  132 1728 

spindle  breakers 46,  47 

stamps  at  Mill  118 1677 

Traylor  centrifugal  pumps  at  Mill  114  ....    1662 

Waddell  Chili  mills  at  Mill  174 1886 

Wetherill  magnetic  separators 1525 

Wilfley  roastine;  furnace 1547 

tables  at  Mill  126 1708 

Weathering  diamond  ore 1080 

for  separation  . . 830,  839 

garnets  at  Meronitz 831 

of  clay 1075 


108 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Weathering  process  at  Mill  188 1921 

Webb  City,  Missouri,  mills  at    1175 

Webb,  H.  H.,  and  Pope  Yeatman,  hand  picking  in 

South  Africa 483,  492 

stamp  mills  in  South  Africa 225 

Webber,  W.  O.,  centrifugal  and  reciprocating  pumps     885 


on  pumps. 


Wedding,  H xx 

concentrating  Thomas  slag 1177 

magnetic  iron  oxides 813 

separation  of  iron  ore 2036 

separators 833,  2030 

Mumford   &  Moodie's  separator 837 

processes  of  separation 835 

Wetherill  process 836 

Wedgewood  mortar  for  amalgam 780,  1025 

Weighing    1160 

conveyor,  Richardson  automatic    2032 

devices 1603 

Avery  automatic  scales  at  Mill  105 1635 

Blake-Denison  continuous  weighers 1603 

Libra  scales 1605 

machines,  the  Blake-Denison 1609 

ore 883 

Weight  and  power  of  steam  stamps 133 

of  Akron  Chili  mills,  table  of 1308 

amalgamating  pan    243 

arrastra 237,  238 

Austin  gyratory  breakers,  table  of 1210 

Bartlett  Simplex  concentrator 1487 

Blake  breakers  at  Mill  158 1821,  1823,  1824 

bosses  at  Mill  117 1668 

broken  ore 1160,  1190 

quartz 1185 

cobbing  hammers  at  Mill  186 1917 

Colorado    Iron    Works    continuous    grinding 

pans 1282 

Comet  breaker 41,  46 

Denver  Engineering  Works  Company's  Blake 

breakers,  table  of   '. 1204 

dies  in  amalgamating  pans 245 

Ding's  magnetic  separators 1541 

Dodge  breaker 30 

Farrel  Blake  breakers,  table  of 1200 

Ferraris  ball  mills,  table  of 1300 

patent  tables,  table  of    1490 

Gates  ball  mills,  table  of 1301 

style  "  K  "  breakers,  table  of 1208 

Gilpin  County  bumping  table 681 

gravity  stamps 218 

stamp  mortars 164 

hammers  for  breaking   11 

Hathaway  gyratory  breakers,  table  of 1217 

Humphrey  rolls,  table  of 1235 

improved  Huntington  mills,  table  of 1312 

International  magnetic  separators   1535 

Kennedy  gyratory  breakers,  table  of 1214 

Kent  roller  mills 1304 

Knowles'  New  Century  magnetic  separators, 

table  of 1542 

Krupp  gyratory  breakers,  table  of 1215 

La  Point  flour  gold  separators,  table  of 1510 

log  washer    324 

machines 1096 

McCully  breaker 44 

gyratory  breakers,  table  of    1212 

McLanahan   and   Stone  single-roll   crushers, 

table  of 1241 

mills 1126 

moving  parts  of   Nordberg  steeple-compound 

steam  stamp  at  Mill  180 1901 

muller  and  shoes  for  amalgamating  pan 246 

new  and  old  jaw  plates  for  Blake  breakers  at 

Mill  100   1624 

Ne»v  Standard  concentrators 1479 

Nissen  stamps  at  Mill  165    1851 

ore  for  sampling 851,  852 

parts  of  stamp 189 

Pilling  hoists,  table  of    1609 

roll  shells   66 

samples  in  mechanical  sampling 1575,  1576 

Samson  breakers,  table  of 1203 

shoes  and  dies 182,  183,  184 

at  Mill  117 1668 

•     stamp  parts    190 

at  Mill  118 1677 

stem 187 

stems  at  Mill  117   1668 

stamps    209,  221 

and  effectiveness  of  blow,  in  gravity  stamps  218 

109 


Weight  of  stamps  at  mills  . .  .  1618,  1620,  1621,  1624,  1626, 

1630 

1632,  1634,  1640,  1645,  1649,  1651,  1658,  1661 
1665,  1666,  1668,  1677,  1679,  1769,  19 1£ 

in  California 1619 

Witwatersrand  1643 

Sturtevant  balanced  rolls,  table  of     1234 

Dodge-type  breakers,  table  of 1205 

tappets  at  Mill  117 1668 

wearing  parts,  Blake  breakers    26 

Dodge  breaker 31 

Forster  breaker 28 

Wetherill  magnetic  separators,  table  of  ...    ,  .    1522 

Wild  roller  mills,  table  of   1304 

table  of  measurements  of 1 187 

units  of 1 187 

Weights  for  rolls 73 

Weisbach,  hydraulic  power 239 

P.  J.,  manual xx 

water  motors   1174 

Weiss,  picking  at 487 

sieve  scale  at   367 

Weldon,  New  Jersey,  Lovett-Finney  magnetic  sep- 
arator at 835 

mill  at 1180 

Welkenraedt,  double  discharge  on  jigs  at 584 

mill  at 1176 

Rittinger  tables  at 668 

Weller  pulp  thickener 2019 

Wellman-Seaver-Morgan,  Company,  Akron  Chili  mill  1307 

Garfield  Chili  mill    1305 

gravity  stamps 1278 

sectional  guides  for  gravity  stamps   1270 

Wells,  J.  W.,  molybdenite  dressing 1567 

mercury 768 

Wendt,  A.  F.,  Wendt  jig ' 640 

crushing  and  jigging  at  Crown  Point  mines, 

New  York 1174 

jig   640,901 

connecting  rods  on , 530 

construction  of 524 

elliptical  gear  on 536 

Wengler  &  Lowe's  classifier 413,  478 

hydraulic  classifier    1367 

Wenstrom  magnetic  separator 800 

data  on  the 2025 

products  of 802 

Wentworth  Company,  mill   1181 

Goldfields  Company,  shoe  and  die  used  in  mill  of     181 

stamps 227 

mill,  plates  in 788 

Wessinger,  H.  J.,  on  breaking 60 

crushing  hematite  at  Minnesota  Iron  Mine  . .       60 

West  Argentine  Co.,  iron  stamp  frame 225 

Western  Chemical  Mfg.  Co.,  Denver,  Colo.,  milling 

at  the  mill  of  the.     R.  B.  Hosker 2045 

Chihuahua,  milling  in    1664 

Wheeled  Scraper  Co.,  jaw  breaker 25 

Westphalia,  jigs  in   641 

mill  in 1121,  1177 

West  Rand,  slime  settling  at 478 

West  Waverly  Gold  Mining  Company  Limited,  mill  xxviii, 

1026 
Yankee   concentrator   of   Detroit    Copper   Co., 

Bryan  mills  at 1309 

effort  to  clarify  water  at 1416 

Wet  concentration  -versus  oil  process 832 

magnetic  separator,  Conkling 810 

screening  tests 1138 

silver  mill 1039 

water  for 1105 

versus  dry  concentration,  bibliography  for 837 

Wetherill  horizontal  magnetic  separator 805 

inclined  magnetic  separator 807 

J.  P.,  magnetic  concentrating  plant 1054 

cost  of  screens 361 

magnetic  separators   804,  891,  1156 

results  of  tests  of 808 

Wetherill  plant  at  Franklin,  New  Jersey.  .835,  1181 

magnet    1 156 

treatment  by  the 2028 

magnetic  concentrating  plant,  Sterling  Iron  and 

Zinc  Company  mill xxix 

mill    1060 

separator 804,  1521,  2025 

A.  Smits 2026 

at  mills  . .  1525,  1810,  1826,  1862,  1863,  1891, 

1916 

attendance  required    1525 

capacity  of 1522,  1523 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Wetherill  magnetic  separator,  electrical  and  mechanical 

energy  required  by    1525 

for  separating  molybdenite  and  biotite.    1568 
Humboldt    Engineering    Works    Com- 
pany      1530 

maximum  size  treated    1525 

proper  distance  apart  for  the  magnets  of  1524 

results  from    2026 

table  of  dimensions  and  weights 1522 

wear  and  tear  on 1525 

width,  thickness,  and  proper  conveyor- 
belt  speed  for 1523 

take-off  belt  speed  for    1524 

parallel  magnetic  separator 804 

plant  at  Lohmannsfeld 2035 

-Rowand  magnetic  separator  at  Mill  141. . .  1763,  1765 

separator  in  Arizona 2029 

Germany 2029 

ores  suited  for  the 2029 

types  of  separators.     F.  Essen 2031 

Wethey,  A.  H.,  Chili  mill 271,  1115 

improvements  in  concentration  at  Butte 2036 

Pratt  ore  sizer 1360,   2018 

removal  of  wood 1609 

Wilfley  table 729 

lifting  magnet  at  Mill  164    1532 

Wetted  perimeter  in  launders 876 

W.  F.  Mosser  and  Company    76 

Wharton  magnetic  cobbers  at  Mill  157    1819,  1820 

Steel  Company,  concentrating  plant  of 1818 

Wheal  Grenville  tin  dressing 1082 

Wheel  agitator 780 

Wheeler  amalgamating  pan 291 

H.  A.,  on  sizing  tests  of  trommel  products    ....     383 

pans 1282 

fine  grinding  in.     W.  Broadbridge 2015 

Zenas,  tappet  gib    188 

Wheels,  dewatering 1590 

raff,  for  New  Humboldt  concentrator 1494 

Wilfley  middlings  return   1468 

sand  wheels 864,  1586 

Whelpley  &  Storer  pulverizer 236,  289 

bibliography  for 299 

whirling  table 236 

Whisk  broom  for  plates    758,  760 

White,  F.,  fine  crushing  machines 316 

H.  A.,  formula  for  speed  of  revolution  of  ball 

mills 1337 

theory  of  tube-mill  action 1323 

tube-mill  experiments 1336 

T.,  gravity  stamps 224 

Whitehead,  Cabell  and  T.  M.  Chatard,  settling  of 

slimes  at  Republic  gold  mine,  Washington    1176 

C.,  settling  slimes 1148 

Whitney  and  Ober,  colloidal  theory  of  slimes 1419 

effect  of  surface  tension  in  preventing  settling  of 

slime   .;..... 1414 

slime  precipitating  agents    1416 

W.  R.,  chemicals  for  settling  slimes    1419 

Whole  bed  on  jigs,  defined 495 

current  box  classifiers    443,  1402 

labyrinths  and  runs    447 

table  of  details  of  444 

means  of  getting 451 

Wickes  boilers 1000 

Width  of  amalgamated  plates 737,  740 

belt  elevators 863 

jig  sieves 591 

rolls 83 

Wilbraham  rotary  pump 925 

Wild  mill 1280,  1304 

regrinding  mill 2015,  2016 

roller    mill,  table    of    sizes,  capacities,    power, 

weights,  etc 1304 

rolls 72 

Wildman  Gold  Mining  Company   xxvii 

mill  1023,  1184 

Wiley,  H.  W.,  agricultural  analysis xx 

settling  in  water    1174 

Wilfley,  A.  R.,  Wilfley's  slimer 2023 

group 1464 

Bartlett  Simplex  concentrator 1487 

Card  concentrator 1481 

Christensen  concentrator 1484 

classification  of 1465 

cleaned-ore  plane  in 1465 

cleaning  plane  in 1465 

Deister  concentrators 1488 

depth  of  bed  in 1510 

Doddbuddle...  .   1481 


Wilfley  group,  Ferraris  patent  table 1490 

James  slimer   1491 

table    1490 

Luhrig-Buss  table 1492 

McLeod  concentrator 1492 

New  Humboldt  concentrator    1493 

New  Standard  concentrator    1478 

Overstrom  table 1479,  1485 

Finder  concentrator    1481 

principles  of  action  of    1465 

roughing  plane  in 1465 

Sutton,  Steele  &  Steele  dry  table 1479 

Woodbury  table 1494 

head-motion  on  shaking  feeders  at  Mill  171 . 1868,  1869 

launders  at  Mill  141   1761 

Impact  screen.     J.  H.  Collins 2018 

roasting  furnace 1546,  1569,  1923 

at  mills 1546,  1548,  1663,  1759,  1765 

attendance  required  to  operate 1548 

capacity  of 1548 

consumption  of  fuel  in 1548 

fines  in  product  sink  in  water 1547 

pyrometer  for  regulating  temperature  in  ...  1548 

size  of 1548 

wearing  parts  of    1547 

shaft  roaster 2029 

slimers 1504 

A.  R.  Wilfley 2023 

at  mills 1628,  1729,  1730,  1855,  1856 

feed  best  suited  for 1505 

head  motion 1504 

on  natural  feed   1505 

operation  of 1505 

principle  of  operation  of    1504 

shaking  frame  for 1504 

sub-frame  for 1504 

trays  or  decks  for 1504 

table 670,  1119 

as  a  slimer 1478 

coupled  with  slime  table 11 10 

effect  of  appearance vii 

feed,  proper  consistency  for 1404 

for  testing 1 153 

raff  wheel  on   864 

riffles  on 721 

testing 1171 

test 1165 

tests  of,  at  Parrott  mill 675 

tables  at  mills  . . .  1620,  1621,  1622,  1625,  1633,  1656 

1657,  1661,  1663,  1669,  1686,  1687,  1689,  1694,  1695 

1703,  1704,  1708,  1709,  1715,  1729,  1738,  1739,  1744 

1745,  1754,  1761,  1776,  1777,  1779,  1780,  1811,  1812 

1829,  1830,  1833,  1839,  1840,  1844,  1848.  1850,  1851 

1852  1855,  1858,  1867,  1870,  1880,  1885,  1886,  1893 

1894,  1896,  1904,  1905,  1908,  1929,  1930 

capacity  of 1469 

consistency  of  pulp  for 1848 

deck  for  1467 

description  of 1465 

elevator  or  raff  wheel  for 1468 

feed  box  for 1468 

for  reworking  dumps.     T.  Tonge  2022 

testing 1471,  1990 

foundation  for 1465 

gold  saved  by  in  western  Chihuahua    1665 

head  motion  for 1466 

height  of  riffle  cleats  for    1468 

in  California  practice 1619 

Canadian  mills    2022 

investigation  of  work  of 1469 

on  different  feeds,    a    study    of    the.     R.    H. 

Richards 2022 

operating  conditions  for 1469 

riffle  cleats  for 1467 

"setting  up"  and  "leveling  up" 1468 

sized  versus  classified  feeds  for  the   1478 

speeds  of  vibrations  of  deck 1465,  1469 

study  of  the.     R.  H.  Richards 1511 

tests  on  at  Mill  162 1493 

tilting  frame  of    1467 

velocity  of  vibrations  of  deck 1466 

versus  Card  tables  at  Mill  159 1830 

other  riffle  tables 679 

wash  water  required  for 1469 

Wilkens,  H.  A.  J 224 

and  H.  B.  C.  Nitze,  plates  at  the  Haile  gold 

mine    787 

Wetherill  magnetic  separators 833 

Wilkes,  T.  A.,  gold  stamp  mill 1178 

Willemite,  detection  of.     E.  K.  Judd 1997 


110 


Pages  1199-1610,  Vol.  III. 


INDEX. 


Pages  1611-2052,  Vol.  IV. 


Willemite,  phosphorescence  of    ...................  1931 

specific  gravity  of   ..........................  1189 

Williams,   Albert,   Jr.,   bottom   discharge  tanks   for 

settling  slimes    .......................  476 

on  settling  tanks  ........................  459 

G.  W.,  metallurgy  at  Broken  Hill  .............  1568 

hinged  hammer  pulverizer    ..............  1281,  1322 

J.  R.,  burnt  lime  for  settling  slimes    ..........  477 

cost  of  milling  on  the  Rand   ...............  2049 

definition  of  slimes  ........................  1399 

slime  precipitating  agents  ..................  1416 

Patent  Crusher  Company,  hinged  hammer  pul- 

verizer ..................................  1322 

pulverizer  ..................................  2015 

Wills,  J.  L.,  Frisbee  Lucop  mill  ..................  294 

Wilson,  E.  B.,  stamps  for  different  processes   ......  227 

steam  stamp    ............................  142,  143 

steel  for  shoes  and  dies   .....................  185 

Wiltsee,  E.  A.  and  J.  B.  Hobson,  arrastra  at  Smarts- 

ville  and  Mooney  Flat  .........................  290 

Wimmer's  jig  ..................................  643 

Windows  ......................................  1100 

Windsor  cyanide  plant,  slime  settling  at  ...........  478 

Wine  Harbor,  Whelpley  &  Storer  pulverizer  at  ....  289 

Wings  in  amalgamating  pans  .....................  245 

Winnowing  ore  dry  .............................  825 

Winslow,  W.  H.,  Ryerson  pulverizer  ..............  299 

Winter,  George  W.,  Peck  separator    ..............  839 

Wire  cloth,  brass  ...............................  1364 

copper  ..................................  1364 

galvanized  ...............................  1365 

iron   ....................................  1364 

Manufacturers'  Association  standards  .......  1364 

phosphor  bronze  ..........................  1364 

screens,  cost  of    ..........................  361 

stationary  ..............................  340 

Tyler  double-crimped  ...................  370 

steel  ....................................  1364 

tinned    ..................................  1365 

Tyler  double-crimped  mining  wire  cloth    ....  1364 

versus  plate  for  testing  screens  .............  1138 

punched  plate  for  screens   ...............  354 

for  jig  screens  ..............................  546 

gauges  ....................................  1194 

S.  H.  Stupakoff  ..........................  2019 

in  screens,  use  cf  bronze  .....................  2019 

netting  for  riffles  on  dredges  .................  1012 

picking  belt  at  Mill  137  .................  1438,  1740 

rope  elevators  ..............................  862 

ropes  ......................................  1095 

Wisconsin,  concentration  in    .....................  1568 

southwest.     G.  S.  Brooks  ................  2038 

Huff  electrostatic  separators  in  ...............  1552 

Iowa,  and  Illinois,  milling  the  lead  ores  of   ____  2038 

Lead  &  Zinc  Co.,  separation  of  blende  and  pyrite  829 

practice  at  Mill  148   ........................  1792 

roasting  practice   ...........................  1548 

zinc  milling  in  ..............................  2038 

Wiswall  pulsatory  concentrator.     W.  S.  Zehring    .  .  .  2023 

Wiswell  electric  ore  pulverizer   ...................  235 

pulverizer,  bibliography  for  ..................  296 

Witherbee,  Sherman  and  Company  mill.  .  1053,  1054,  1059, 

1117,  1820 

products  of  WenstrSm  separator  at  .....  802 

Witherite,  specific  gravity  of  .....................  1189 

Witkowitz  coal  washery.     H.  Fillunger    ...........  2052 

Witter,  magnetic  concentration  ..................  836 

Witwatersrand,  cost  of  producing  gold  in.  1983,  1984,  1985, 

1986 

general  milling  practice  in  ...................  1643 

hydraulic  stamp  used  in    ....................  1257 

mill  equipment  on  the  .......................  2012 

milling  on  the,  H.  H.  Webb  &  P.  Yeatman  ____  2035 

practice  on  the.     E.  D.  Chester  ............  2035 

Woakes,  E.  R.,  amalgam    .......................  789 

at  the  Espiritu  Santo  mill  at  Cana  in  the 

Darien  ..............................  788 

amalgamated  plates    ......................  759 

concentration  in  the  Koctenay  district,  B.  C.  .  2034 

Espiritu  Santo  mill,  Cana,  Darien  ...........  2033 

remedy  for  hard  amalgam  .................  2024 

Wolf  breaker  ...................................  56,  58 

Wolff,  D.  D.,  Waugh  &  Bignell  concentrator  ......  838 

Wolframite,  hindered-settling  test  on  ............  613,  617 

separated  from  tin  ores   .....................  829 

settling  velocity  of  .................  .......  466,  469 


specific  gravity  of 
ifie 


Wolverine  mine,  cost  of  mining  and  milling   1131 

Mining  Co 1181 

Wood  and  Laschinger,  mechanical  efficiency  of  sand 

wheel 1587 

burned  to  recover  gold 177 

for  launders 872 

mill  buildings , .  1088 

riffles 721 

slime  table  surface   688 

stamp  guides   155 

frames  for  jigs 522 

grizzlies 333 

Henry  E.,  amalgam  trap  for  concentrating  tables  1516 

jig  tanks 522 

picked  out  by  hand 482 

pipes  for  acid  water 1 106 

removal  of.     A.  H.  Wethey    1609 

from  ore ,                   .  1607 

at  Mill  164 1849 

removed  by  hand  picking   480 

removing  device.     A.  H.  Wethey 2031 

required  for  drying 899 

retorting  782 

sieve  frames  for  jigs 538 

steam  stamp    136,  201 1 

surface  for  slime  tables 695 

Woodbridge,  D.  E.,  Anaconda  concentrator 2040 

Arizona  Copper  Company 1923 

and  Sonora 1923 

concentration  at  Cananea,  Mexico 1923,  2038 

in  Arizona    2038 

La  Cananea  mining  camp 1923 

ore  dressing  at  Cananea    1419 

water  consumption  in  Arizona 1925 

Woodbury-Benedict  jigs  at  Mill  177 1892,  1893 

bull  jigs 1449 

at  Mill  164 1849 

clean-up  jig   1448 

concentrators 1494 

at  Mill  117 1669 

distributor 858 

end  shake  vanner   701 

Evans,  and  Collom  jigs,  capacities  compared. . .  1448 

Imperial  concentrator 2023 

jig  systems 1440 

J.  T.  Glidden    2022 

jigs 1447 

at  mills 1448,  1449,  1450,  1451,  1900 

differential  motion  for   1457 

middlings  jig  1448 

slime  classifiers 1447 

at  Mill  164 1850 

system  of  ore  concentration 1459 

table 676,  680 

vanner    654,  656,  659 

belt 647 

Wooden  jigs,  life  of   604 

Woods  dry  placer  machine 838,  839 

Wood's  mill 235 

bibliography  for 296 

Woodward,  A.  E 476 

Woolen  blanket  tables 703 

Worcester,  S.  A.,  design  of  milling  plants 2049 

Work.     See  Power. 

done  in  crushing  by  rolls 312 

of  Blake  and  Dodge  breakers  compared    35 

classifiers,  quality  of 461 

steam  stamps,  quality  of 134 

required  for  crushing 304 

ore 308 

Your  Own  Diggings  mill 1021 

Working  of  amalgamating  pan 248 

Worthington  centrifugal  pumps  at  mills. .  1696,  1745,  1881 

pump 920 

at  Mill  175 1890 

Wrightson's  coal-picking  table 2021 

Wrought  iron,  specific  gravity  of 1189 

W.  S.  Tyler  Company 354-355,  370,  1138,  1196 

figures  on  cost  of  screens 548 

Wulfenite,  specific  gravity  of    1189 

Wunderlich  coal  washer  (classifier) 477 

trough  classifier 478 

Wynkoop,  N.  C.,  mining  in  New  Mexico    2036 

W.  Y.  O.  D.  mill xxvii,  1021 

Wythe  Lead  &  Zinc  Co 809 

Mine  Company,  mill xxix,  1065 


Wolf-tongue  classifier  ...........................    1369 

improved  classifier    .......................    1387 

Wolhuter  mill,  details  of  stamps    .................     221 


Xenon,  atomic  weight  of 1188 


111 


Pages  1-643,  Vol.  I. 


ORE  DRESSING. 


Pages  644-1197,  Vol.  II. 


Yagle  Foundry  and  Machine  Company,  Blake  rock 


1223 

789 
229 
291 


breaker . 

Yale,  C.  G.,  amalgamators 

Huntington  oscillating  stamp  mill 

Huntington  pan 

Tustin  mill 294 

Yeatman  classifier 399,  477 

Pope  and  H.  H.  Webb,  hand  picking  on  the  Rand  492 

milling  on  the  Witwatersrand 2035 

on  mill  tests 1168 

stamp  mills  in  South  Africa   225 

Yellow  Aster  mill,  Randsburg,  California    2043 

Dog  mill,  Missouri.     R.  L.  Herrick 2042 

ground 1080 

Yield  of  small  tests 1168 

Ymir  stamp  mill.     S.  S.  Fowler 2034 

Yoke  for  magnets 794 

Young's  gold  dredge 2043 

Yreka,  California,  dredging  at 1007 

Ytterbium,  atomic  weight  of 1188 

Yttrium,  atomic  weight  of 1188 

Yuba  River,  dredging  on 1013 


Zacatecas,  arrastras  at  238 

Zaratite,  specific  gravity  of 1189 

Zeile  Mining  Company  mill xxviii,  1034 

Zenner 479 

Zinc  amalgam    730 

for  brightening  mercury 785 

atomic  weight  of 1188 


Zinc  blende  and  barytes,  separation  by  decrepitation 

and  screening 1565 

chloride,  a  heavy  solution  for  testing    1993 

cost  of  producing    1968 

ore,  magnetic  separation  of 809 

mill  for 893,  903,  909,  910,  911,  958,  961,  965, 

1004,  1005 
See  also  Blende. 

ores,  foreign  schedules 1933 

impurities  affecting  value  of 1932,  1933 

Joplin  zinc  ore  penalties 1939 

ore  prices 1939 

marketing 1997 

mills  for   892,  900,  908,  1060,  1065,  1066 

roasted  for  porosity 829 

schedules  for  calculating  value  of    1932 

separated  by  roasting  and  magnetism 814,  815 

treatment  charge  on 1933 

value  of  precious  metal  values 1939 

western  zinc  ore  prices 1933,  1938 

plant  at  mills 1718,  1746 

required  in  precipitating  boxes  at  mills  ....  1628,  1632, 

1641,  1673,  1678 

specific  gravity  of   1 189 

sulphate  solution 1156 

Zincite,  specific  gravity  of 1189 

Zircon,  specific  gravity  of    1 189 

Zirconium,  atomic  weight  of 1188 

Zirkler,  H xx 

German  mill  schemes 1174 

gravity  stamps 223 

rolls  in  Germany 109 

slime  tables  in  the  Harz  mountains 728 

Zollverein  colliery,  air  blast  at 837 

mine,  air  blast  at    839 


112 


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